Rebalancing is the concept you're looking for. https://www.investopedia.com/terms/r/rebalancing.asp https://www.investopedia.com/terms/r/rebalancing.asp As for

Rebalancing is the concept you're looking for. https://www.investopedia.com/terms/r/rebalancing.asp https://www.investopedia.com/terms/r/rebalancing.asp As for your strategy, if it really keeps doubling, and you only take out 10-20% per doubling, you'll end up with 90% of your net worth in bitcoin, which seems unreasonable. But that comes down to a question: even if you give it high odds that it will continue to go up, if you're not certain of it, then you should probably want to accept some risk of losing future gains to avoid some risk of losing what you have. If you are certain it will go up...you have bad judgment.