Compared to altcoins, Bitcoins is still relatively stable. If you want to gain a lot of money, you have to take risks.
Well put, if your looking for a stable investment crypto currency is the wrong industry. However if you are looking at risking some money for a large reward, many analysts agree that the potential for crypto is promising.
Bitcoin at the moment will provide you with the greatest market stability, however investing in some lesser established cryptos might prove to be the most rewarding long term.
A strong portfolio is always a diversified portfolio.
Take some stability, mixed with risk and ride the wave:)