Yes, you are right. It is not wise to invest in bitcoin if you do not know how to do so. But it is better to invest money in the bank than make a profit by saving. There are many other types, but others, such as investing in a business or sharing, will bring good earnings.
You make a fair point that Bitcoin's not for everyone, but sticking your cash in a traditional bank isn't exactly "investing" either. It's more like watching your money slowly lose value to inflation. If you're serious about making your money grow, you gotta explore some actual investment options and do some digging, no matter what you choose! There are many options out there, like investing in businesses, real estate, precious metals or even other cryptocurrencies, but blindly jumping into anything is not good.