To avoid “garbage coins” coming out in bull market, you just have to stick to your coins you are invested in today with at least over one billion valuation. You as well can say the same about when market is completely oversold. Instead of celebrities, mainstream media, friends etc talking crazy about crypto, there would be complete quiet, non talk or if any talk, people would be talking about bitcoin as being dead, or it’s over for cryptocurency. I’m actualy starting to hear it now. There is not a day when I read about bitcoin being dead. When it’s a bubble, everything goes up regardless it’s fundamentals. That’s why you have to be extremely cautious and careful.