That is because you invested in wrong time, or people you saw that lost a lot invested at a wrong time. Imagine newbies or people that invested when a coin bull market has gone so far, they invest and lost money. That is not a good way of investing. Professionals invest even the market has fallen so that the market will rise again. Patience is very important while investing in cryptocurrencies or losses is ensued and certain. But we should not invest on shit coins though.
I am not sure - maybe earlier when there was less people in crypto the market was clean, there was less distraction and people decision was made on the real assumptions made. There were less scammers in the market too. But now there is no use of investing in the crypto there are more losses than profits. So I might look for other opportunities.