I started purchasing bitcoin during the '14 bubble and throughout '15, have come back to crypto and its still not mainstream. Its definitely improved since i was involved as you had a bunch of shitcoins and the main contenders were bitcoin, ripple, dark coin and dare i say paycoin. It was being banned in different countries, and not many people were transacting. Now, with the explosion of ETH and the blockchain, not to mention the dark web; its growth is unbelievable. I work in the financial industry and crypto isn't talked about much, other than a mention if btc hit all-time highs. I think it still has some time to go before becoming mainstream, and thats when the real bubble will occur. Right now you have all the smart corporate money positioning themselves for the bubble. As in the above posts, pump in money u can afford to lose and hold on for a couple of years and see what happens.