Trading is a very unpredictable job indeed but sometimes you got to rely on the luck a little bit too to carry you.
Not always skill will be enough especially not with trading you will have to take risks to get somewhere.
Yes it is, especially in trading coins, you'll never know what'll happen in the future as many whales are manipulating the price of a certain coin. Especially those scam ones which are pump and dump. So, better research first before you buy a certain coin to trade and have a system that will make you earn profit even little by little but at least, you are earning and time will come that you will be one of the big earners in terms of trading.