Before you venture into a crypto space and even thinking of investing in a bitcoin,you should ask yourself first whether bitcoin is an asset or not
This book,
The bullish case for Bitcoin can help you finding answer for your question.
Briefly, Bitcoin can be used for many purposes, like either an asset, a transaction mean, whatever you see good for your demand. It can serve you with its usecases that are diversifying enough for you.
An asset, it is, but if you need Bitcoin for other tasks, it can serve you too.