I wouldn't say that I'm an expert on the economics of cryptocurrencies or fiat currencies. However, what I have learned from being involved with crypto currency over the past few years is that investing here is very risky unless you know the right way to invest. Now to know the right path, you need to know how much your ability is, you have to invest depending on your ability, it can be long-term investment or a short-term investment.
Your situation is very similar to mine. I myself do not know much about cryptocurrency trading. I have tried short-term trading several times but I have faced loss due to my lack of knowledge about technical analysis. So currently I have thought of long term investment and yes of course it is Bitcoin. I will also tell you that if you have a stable income, separate a percentage from it every month or every week and invest in Bitcoin for a long time using the DCA method. Here you will have less risk and more security