trading is not the same as buying and selling and how easy that is. you may had had access to the easiest way to sell your altcoins for fiat directly and immediately but you still wouldn't have been able to earn any profit because that requires expertise.
it is not about buying some altcoin that is on top and bag holding it hoping it gives you profit. it is about knowing which coin out of the 2000 altcoins to choose at any time and also more importantly is to know when to dump that altcoin you bought instead of bag holding it while it loses value since whales dump on you.