yeah these online wallets are pathetic. Kraken support generally takes only a couple hours at most a day.
COinbase is just as inept as those wallets as ive yet to get my 2FA code resent.
the first code expired since it came about 2-3 days later when i wasnt around my computer and now i cant get a new one sent.
i cant believe some people consider coinbase top five exchanges !?
No, I won't, all custodial and online/web wallet isn't worth it to entrust your crypto asset.
Just do as suggested on the first page, Electrum is very reliable upon storing any amount as long as your private key is in your control, not like those wallets that I mentioned above, the online/web wallets which you didn't have full control of the private key, remember this rule "
Not your key, Not your coins".
Don't leave your crypto assets on any exchange platform too, maybe it's considerable in a short term but not in the long term.