Compounding and Drawdowns in Crypto

Most guides sell compounding as a smooth curve that bends upwards over time. Crypto does not move in smooth curves. It rises fast and falls further than most beginners expect, and the arithmetic of those falls is harsher than it looks. This lesson shows the maths of both sides, and what it means for how much you put into any one coin.

How compounding works

Compounding means your gains earn gains of their own. Say a holding grows 10% a year. £1,000 becomes £1,100 after one year. In the second year the 10% is earned on £1,100, so it adds £110 rather than £100, and you finish on £1,210. The third year adds £121, taking you to £1,331.

After ten years at 10% a year, £1,000 becomes about £2,594, because 1.1 multiplied by itself ten times is 2.594. Adding a flat £100 a year would have reached only £2,000. The extra £594 is the compounding.

That example assumes a steady 10% every year, and crypto never behaves like that. A coin can double in a few months and lose most of it the following year, and when returns swing that hard, the falls matter as much as the gains. Bitcoin also pays you nothing for holding it, so any compounding comes from the price alone, unless you stake, which is covered below.

Losses are harder to recover than gains

A fall and the gain needed to recover from it are different sizes, because the recovery starts from a smaller number. Take £1,000 that falls 50% to £500. Getting back to £1,000 needs £500 of gains on £500, which is a 100% rise.

• A 50% fall leaves £500. Recovery needs £500 on £500: a 100% gain.
• A 75% fall leaves £250. Recovery needs £750 on £250: a 300% gain.
• A 90% fall leaves £100. Recovery needs £900 on £100: a 900% gain.

None of these numbers is far-fetched in crypto. Bitcoin has fallen more than 75% from a peak more than once, and ether and most smaller coins have fallen further. A drawdown of 75% turns your holding into a repair job that needs the price to quadruple. A 90% fall on a small coin is often permanent: many coins from earlier cycles never returned to their old highs, and some went to zero.

Volatility drag: why swings cost you money

Volatility drag is the cost of a price swinging up and down. Say £1,000 rises 50% to £1,500 and then falls 50%. Half of £1,500 is £750, so you finish down 25%, even though the two moves look as if they cancel out. Reverse the order and the result is the same: a 50% fall takes £1,000 to £500, and a 50% rise takes £500 to £750.

The same effect hides inside averages. Take two hypothetical coins over two years. Coin A rises 10% each year, so £1,000 becomes £1,100 and then £1,210. Coin B rises 70% and then falls 50%, so £1,000 becomes £1,700 and then £850. On paper both average 10% a year, since 70 minus 50 is 20, and 20 divided by two is 10. One leaves you £210 up and the other £150 down. The wilder the swings, the further what you keep falls behind the average.

Why position size matters more than your entry

Beginners worry most about buying at the right price, but the size of the position matters far more. Say you buy a small coin at £1.00 and it falls to £0.10, a 90% loss. If you had waited and bought 10% cheaper at £0.90, the same fall would cost you £0.80 on £0.90, about 89%. The better entry barely changed the result.

Now change the size instead. Take a £10,000 pot and put half of it, £5,000, into that coin. A 90% fall leaves £500 of it, so the pot is £5,500: down 45%, and needing an 82% gain (£4,500 on £5,500) just to get back to £10,000. Put 5% in instead, £500, and the same fall leaves £50. The pot is £9,550, down 4.5%, and the rest of your money is still there to compound. The entry price moved the loss by one percentage point, while the position size cut it tenfold.

That is the case for building around bitcoin and ether and keeping anything smaller small, which Crypto Risk and Diversification sets out in detail.

Time in the market, in crypto

The usual advice is that time in the market beats timing the market. For bitcoin, past cycles have rewarded people who bought and held through the falls, though they asked a lot of them: sitting through drops of more than 75% and recoveries that took years. That is history, and nothing guarantees the next cycle behaves like the last.

For most smaller coins, time in the market did the opposite. Patience only pays if what you hold survives. If you are adding money over time, Dollar-Cost Averaging into Crypto shows how to spread your buying so that no single price decides your result.

Holding for years is also a different game from the daily issue, where the desk reads derivatives positioning each morning and makes one call or passes, and degencoder trades every call. A holder needs far fewer decisions.

Staking: compounding in coin terms

Staking locks or delegates your coins to help secure a proof-of-stake network, and the network pays rewards for it. The rewards are paid in the coin, so if you restake them, your coin balance compounds.

As an example, say you stake 10 coins at a hypothetical 4% a year and restake the rewards. After one year you hold 10.4 coins. After two you hold 10.816, because the second year's 4% is earned on 10.4. Now suppose each coin cost £100 when you started and the price falls to £50 over those two years. Your 10.816 coins are worth £540.80, against £1,000 at the start. Your coin count grew by 8.16%, yet your money fell by 45.9%, because the price did most of the work.

Some staking has lock-up periods, so you may not be able to sell during a fall. If you earn yield through an exchange or a lender, you also carry their risk: Celsius, a crypto lender that promised high yields, froze withdrawals and went bankrupt in 2022.

What breaks compounding

Compounding needs money that stays invested and a base that is never wiped out. Three habits break it.

• Leverage. Borrowed exposure turns an ordinary fall into a total loss. With 10x leverage, £1,000 of margin controls a £10,000 position, so a 10% fall costs £1,000, which is everything, and the exchange usually liquidates you before that point. Perpetual futures explains the mechanics. A long-term holder has no need for it.
• Panic selling. Selling after a large fall turns a paper loss into a real one and leaves you outside any recovery. Writing down in advance what you will do in a 50% fall is the cheapest protection there is.
• Blowing up on a small coin. One oversized position that falls 90% needs 900% to come back, and it usually does not. Keep every small coin to a size you could lose entirely.

Avoiding these matters more than finding the best coin. Common Crypto Investing Mistakes covers the rest of the list.

Key takeaways

• Compounding means gains earn gains, but it only works on money that is still there.
• A 50% fall needs a 100% gain to recover, a 75% fall needs 300% and a 90% fall needs 900%.
• Swings cost money: up 50% then down 50% leaves you down 25%.
• Position size changes your loss far more than a better entry price does.
• Staking compounds your coin count, while the price decides what those coins are worth.