There is no how you can take profit without selling your bitcoin, assuming you bought $50 worth of bitcoin and the price doubles, then you want to take profit and keep the capital all you got to do is to sell part of your bitcoin that worth the amount of profits you want to take and leave the rest, that the only way you can take profit, you can't eat your cake and have it back, if you don't want to sell then you don't need to take profit.
That idea is somehow interesting, you're only going to spend the gains and just letting your capital run until such time it gained much bigger profit. Spending everything isn't a wise idea, so we should think wisely before taking actions.
Diverting you profit with other coins that has good potential was also another strategy, you're getting good gains while presently holding btc and enjoyed all benefits.