They actually cannot push any changes to BTC, the only changes possible to BTC and how it operates would be its halving. And yes you're right BTC is definitely an investment, and operates in similar function to stock, (obviously there are many differences, but the core function of demand = value remains.) Unless you think you can do well in the stock market I don't recommend trying BTC, and if you think you can do well in stocks, then put your money in the S&P500, which averages a 7% annual return, this is actually a very common practice in wallstreet because banks no longer properly compensate for inflation, with interest.
This is my opinion, I am not a professional nor pretend to be, I encourage you to research yourself and even look at outside events or things that could possibly affect whatever you are looking into. Also my information could be incorrect or outdated, as could anyone else's.