Also periodical investment in Bitcoin is not a bad idea. But I will suggest to diversify your portfolio. Not just Bitcoin, but also include gold and silver into it. In longer term, it will give you a great return.
Bitcoin offers investors the opportunity to enter the medium- to long-term investment space, regardless of their budget. Your advice to diversify the investment portfolio is sound, but investing in the gold and other metals market requires a significant amount of capital, given that their prices are stable and only generate good returns if the investment is large. Furthermore, storing these precious metals is problematic, as you may have to pay to insure them in a vault.
I believe it would be better to diversify your portfolio with cryptocurrencies, as they are easy to store, and their constantly fluctuating price presents significant risks for those dreaming of quick wealth.