Worth buying 2k now?

Hi, I’ve had £2,000 physical cash on hand for a little over a year now not touched from inheritance. I’m a bit late to the game as could’ve invested back then but thought having the cash spare would be handy so I had kept it out of sight and mind. I started investing in February this year around £150 on a Ledger device and kept that and the words safe but now I’m wondering is it worth putting that spare cash into Bitcoin? I don’t have any plans to need it in the short term. What might be my expected returns? Thanks