Of course, I understand that the asset should be sold if you received minus 15%, but if the coin showed good growth and income was at least 20%, then what are your actions next? Should this coin be kept on or sold, earning on the price difference?
If the coin shows good promise in going up at least 20% I'll try to ask my colleagues whether they sell the coin or not. But, my rule is just 20% profit -20% lose. If I am the only one to trade that coin, then I'll sell it immediately at 20% up. But, if my colleagues tell me that, that coin has good future growth then, I'll sell about 25% of my holdings.