In any movement of the market up or down, you should always have a portfolio consisting of several assets, regardless of the current market. This is a mandatory rule of the investor. I also think experienced people have no problem to distinguish a promising project from a scam project
Smart guys will wait patiently to take profits from ups and downs of market, not complain all the time.
Sure the more experienced ones will know how to earn money even in bearish markets. But that actually needs a lot of time to learn and is not something for everyone. But sure it is always a good idea to have a well spread portfolio to actually be prepared for everything