People are thinking about cryptocurrencies in the wrong way.
Sure there is a lot of volatility that can be and is exploited but it is dangerous to speculate on swings and roundabouts. (Don't gamble)
A better method of supporting / investing into cryptocurrencies is to do research and find ones which serve a purpose - for example, when I came across Steem I could see the potential of a decentralised media space. This is why I have started to get involved in Steem.
Seek cryptocurrencies with greater potential for expansion rather than ones which may fluctuate.