Was I wrong in investing in FBTC?

So I invested 10% of my portfolio into fBTC a few days ago because I was of the understanding that it tracked BTCs big gains without the hassle of actually owning a BTC and needing to buy and secure a cold wallet for it. I understood that I wouldn't actually own BTC or be able to purchase things with BTC, but I didn't care as that wasn't my priority.

As of today it is down 2% whereas the actual BTC is up 2% within the last 24 hrs as also are the other major cryptocurrenices (ETH and Dogecoin).

Am I missing something ? Admittedly I haven't done months of research like I normally do before I invest in something, but its performance is the inverse of the actual BTC. What gives ?