I know in this field many possibilities happen but it's also true that those possibilities only for big money investors not for regular traders. Regular traders makes 100 200 or 300 dollars and one he lost everything in this market. So overall its bad impact on the market. Price manipulate by few people and exchanges and they can move price any direction and you can't do anything just watching to loose your money.
Markets will always be markets, you can't find a market where the prices are stable all the time. You can trade with gold, stocks, crypto or tomatoes, it's almost the same, there will be a time when prices will go down, and times when the prices will go up, learning how to surf on the waves and take the best from it (making profit) is a skill, and it's not for everyone! How much can you earn on the markets, there's no limit, you can start with small amount and make a fortune, you can start with fortune and lose it all, I saw many stories, and which story is yours will depend on you! Your skills, your bankroll, patience, you will have to give all you have if you wish to become successful. Every market can be a subject of manipulations, and nobody stops you from take a break when you see some whales coming in, you can dump what you have and wait for the prices to dip and buy when whales are buying.