No need to use an algorithm on crypto , this is not like gambling , but what I am sure about it is that this is not a bullish market who will take us to the moon , and sooner or later it will go down again when people will start selling when it comes to take the profit value . My advice for every one is to start selling with small amount and not the whole portfolio just some piece and reinvent in other coins that didn't increase a lot or their price went down . It's a smart move for sure .