Why investors are always complaining is because people can't be happy. We always want more than we actually have. And if you lose more than what you have invested, the complaints are understandable. No?
Did you invest into cryptos and are you still making profits? Good for you if it is the case. But for some people it is the contrary. The world can't be equal and trading cryptos is 100 percent for capitalism.
You have to undergo with more information and understanding before you start working with this industry, the market is not that easy and very risky, complain is everywhere whenever the investors loses their money, expecting too much but in realization things ain't comes to what they expected. You can continue if you are willing to take the risk and able to wait until finding the right attitude.