So far, it seems to me that a level-headed crypto bull would have had an advantage over the average crypto trader. Winning strategy, historically, would be to be biased towards holding Bitcoin, but selling when the price rises start to reach maybe 20% /day, and resisting the urge to buy back in when the price is rebounding a few months after a major bubble burst, choosing instead to start buying when the price has gone down to 20% of the previous top.
One problem is, it's really hard to follow that strategy since most if the time, it'll look like the market is moving against you. A bigger problem is that the strategy assumes Bitcoin will continue to rise in valuation for at least one more bubble. Which is a huge assumption to make.