Arguably, a similar type of evolution that has occurred with Bitcoin is underfoot for Ethereum (ETH) and/or Litecoin (LTC), which CoinFlash and Dust let's you invest in as well (from your spare change rounded up to the nearest dollar amount and purchased once a month). If you want to use Coinflash like I do, this link will get you the first three months free.
Now, if you still have fear uncertainty and doubt (FUD) with respect to regulatory issues, taxation, estate planning, and larger economic trends, you can even purchase through a traditional Financial Instrument. There is now a Bitcoin Trust called GBTC - Greyscale Bitcoin Investment Trust (which charges a 40% PREMIUM - YOU READ THAT RIGHT). Currently GBTC has a corner on the mainstream Bitcoin market, but will likely deal with price drop as competitors arrive and lower their market leverage.
You may ask why would someone would ever pay a 40% premium on Bitcoin when you can buy it on Coinbase App today at cost? Good question. Well there are a couple reasons that could make it viable. Number one, this investment shows up on your traditional portfolio with your Financial Advisor in the exact same way any regular buy order shows up, which takes some of the "mystery" and "confusion" out of Bitcoin, and it also assures that you'll be "on the up and up" with respect to taxation and regulatory issues. Although this mainstream method doesn't protect you from the volatility of this new cyrptocurrency, it does enable you to purchase it with your Roth IRA and/or 401(k). As these types of financial instruments are seen in play over a course of decades, and which offer certain tax benefits, if one were quite bullish on Bitcoin it may make sense to apply this instrument in acquiring it (and to think people have said they first bought Bitcoin from a stranger at Starbucks with a bag of cash)!
Moreover, a traditional instrument would open the conversation with your financial advisor about why the premiums are so high, and for them to be aware you are looking for something better. Lastly, if you purchased GBTC with your regular money (that is not via a Roth or 401K), you would have quick and painless access to transferring high gains, if any, (in excess of 10,000) to your bank account. Here is an article that discusses this in more depth. Although with these benefits stated the best piece of advice I believe I've heard thus far in researching and discussing this new world of cryptocurrency, is to get the money you can spare into crypto, and never convert it back into fiat (unless you need to).