Accordingly, Fidelity allows customers to use the company's website to track their Bitcoin assets through a Coinbase e-wallet.
After a little research, I found the below article from Fidelity website itself. Please see below,
It says, currently you can't invest in crypto currency in Fidelity. I am wondering how you got this news that this company is accepting bitcoin or other cryptos as a method for investment? It clearly says, they don't accept cryptos for investment.
Also if a company accepts cryptos, that certainly doesn't mean that crypto is backed up by that company. Just an FYI.