We should not invest in something we dont have an idea of how it works, if you dont know anything about stocks then you are gambling since you are hoping to win based on your luck alone, if your field of expertise are crypto currencies then that is where you should invest.
A stock, is a share in the value of a company, out there in the real world, making real products, and making real profits. In the case of AMD, they are about to release a great new CPU which will put their brand right back on the map, and then some time down the line, they release a GPU which should do the same thing. Profits and market share should improve significantly, hence the value of their stock should continue it's broad rise.
Bitcoin, is a share in the value of a cryptographic ledger. A ledger system that is as of yet to offer any practical advantages to end users (not involved with darknet markets or small time fiscal control evaders) over conventional finance, whilst financial institutions are busy developing their own crypto ledger systems.
The point is, for those looking to make a fast buck (most people here), Bitcoin just isn't that good a prospect right now, offering way lower likely net returns with way way more risk than many conventional stocks, with AMD just being one example.