Bitcoin is steadfastly growing and global market continuously adopts it. Everything is possible, there are numerous businesses who accepts bitcoin as a form of payment and i wont be surprised if big companies such as Amazon conforms to use it also.

Yes.It is very risky, and as the saying goes, never put all your eggs in ONE basket. Have yourself at least many options(From a -z) to deal and invest your money. Bitcoin is promising as an investment but market is not that stable. You might not want to wake up one day losing all your hard earned money because the market crashes without you being an aware of it. Try to put little of your money and let it roll and roll as you earn. Or try to pull back your earnings and try to put it in other investments as well. Think and decide carefully what you think is the best for yourself.