Should I buy 1 BTC now?

I have around 80,000 cash saved up and was looking into purchasing my second investment property soon. Would it be wiser to purchase 1 BTC, or generally speaking diversify myself with a portfolio of cryptos? At this time, I own no Bitcoin and a small amount of eth and Ada. I’m having a hard time committing to dropping 60-75 thousands for down payment and closing cost. Even with cash flow, appreciation , and possible tax write offs, I’m just thinking it would take to make that money back. It seems like crypto had a bright future from what I’ve seen, heard, and read these past 6 months.

Opinions?