So basically you are telling us that people are not investing to lose their money? That in fact one should only invest in things that you believe will be big one day? What a brilliant strategy indeed!
I don't quite understand your remark. I don't see "Wall Street" rushing to buy bitcoins. I see a lot of venture capital going into companies that plan to make a profit from others using and trading bitcoin.
E.g., the bitcoin exchanges make money whether the bitcoin price is rising or falling. Ditto for bitcoin payment processors, managers of bitcoin funds, bitcoin storage companies, makers of hardware wallets, etc.. Those ventures are "safe bets" because they may well return the invested capital, with profit, even if the BTC price were to crash and they had to close.