Of course, I'm new to this topic, but it seems to me that if we consider bitcoin as an investment in the long term, then the purchase may be justified, even if the price is high now. But in order not to incur losses, portfolio diversification is important in any case.
Think of diversifying after you have gotten some nice amount of bitcoin In your portfolio and if you are thinking of diversifying, is better to diversify in something out side the crypto space , than wasting resources in purchasing shitcoins in form of you diversifying.
Diversifying when you haven't gotten far in your bitcoin purchases will only slow down your bitcoin accumulation because you will be focusing your resources in other places , so better to take things step by step .