Wall Street is the whole reason Bitcoin is even anywhere near where it is now though. The market cap and trading volumes are so large that basically only large investment firms and billionaires have been affecting the price for a while now. They're just competing against each other, and any non-rich crypto-holders are just along for the ride.

Diversifying is definitely a great idea though. Just remember that buy BTC and Ethereum and Gridcoin is not diversifying, since all crypto prices are tied together. To really diversify, invest in a stock index fund. Maybe some real estate.