Buying and holding coins is not as easy as people say because it all requires technical and fundamental analysis.
Trading is buying at a cheaper price and selling it when the price increases, but this is done in the short term, of course we must have the right and accurate strategy.
I am sure, not always trading has to be profitable in one session... it could be that intentionally losing with a certain purpose can have an impact on the next investment... we all too simply deny trading by buying cheap, selling expensive... directly it is indeed profitable, but I think there are some people who have better planning than that...
For example... some people with great capacity, are able to bear small losses, to manipulate the market and are ready to receive big profits in the next trade... yes, sometimes losses are also part of the plan.. we need to lose now, say 5% for a future profit of 15%... we still get margin and we still profit, it's just postponed.... because patience is different in its way...
Don't assume that people who lose in the current trade are people who fail.. don't... as long as we don't know what plan is being carried out, don't judge something that we don't know completely..