Having your money in the BTC itself an investment. THings you can do with our BTC are you could do trading, lending, buying other Alts. Trading is extremely difficult which requires an understanding of the technical indicators or technical analysis which plays a vital role in trading I would not suggest trading. You could consider lending your BTC which gets you some BTC rewards for simply holding your BTC but there are a lot of scam projects out there offering the lending products so I would suggest the lending products offered from Binance and OKEX exchanges which are less riskier. Buying Alts can lead to losing your value in terms of BTC even if you plan to invest in Alts don't invest in the coins beyond Top20 by market cap.