I can only say that you can consider yourself lucky that you can still access your coins, unlike many others who have lost access to that wallet in one way or another. My advice is to move your coins to a non-custodial wallet as soon as possible, preferably an open-source hardware wallet. Of course, if you have an old computer on which you can create a cold wallet, that is also an option that is even safer than hardware wallets (and of course free).
His question is, is it safe to move his coins to the DeFi wallet as advised by blockchain.com?
I've had an account on this website before, but I haven’t really stored my bitcoins there, as access is only through email and wallet ID. So, I'm also curious about the safest solution for transferring funds, since I might check my old wallets and could find some surprises.
