but you can manipulation demand and can incraese price if you have much money, you can pump everything coin you want if you have much money
In cryptocurrencies, manipulations are becoming so common as people are just ready to invest somewhere. If you are capable of green change of an altcoins, you may make some good amounts of bitcoins at the end of the day through intensively manipulating prices. Innocent traders who are thinking for big profits are got trapped most of the times.
Choosing well established coins for trading/investing could be a one practice to avoid manipulation surprises. But in recent times XRP and LTC also showed big sudden fluctuations to make us think about how to choose altcoins. Probably staying away from altcoins could be a solution as of now.