I think the contribution to bitcoin is a risky business. I thought about it myself, I was thinking about buying and reselling on stock exchanges (websites), but I did not dare. There is information on the Internet that bitcoin will go down in 2018.
2018 will be the year of the altcoin, and that's what I'm experiencing so far, with Cardano ADA being my best performer. Heck, 2017 was also the year of the altcoin if you look back at how ethereum, litecoin, neo etc increased relative to bitcoin.
I'm willing to bet that many poker players who go to the
wsop next summer will have earned their buyins with gains from cryptos. Word gets around.
Regarding bitcoin as an investment, thousands of people are looking into checkbook self-directed iras whose passive custodians allow holdings in cryptocurrency. The SEC in America is already watching for potential fraud schemes, and the IRS can't wait for someone to break a rule in their SDIRA, triggering a disbursement, taxes and penalties. It's a feeding frenzy, and people are looking at ways they can protect their crypto gains from taxes.
But for people who just want to put a few chips down, this environment (at the moment) is perfect. It won't last forever, and then it will get ugly.