How to safely store coins/keys as vagabond? Thinking Coinbase may be my best option

Hey all (apologies in advance if I get any of the terminology wrong here, I’m not an expert and just looking for a bit of advice) -

For the last couple years I’ve stored my Ethereum using a ledger wallet with my seed phrase split into 3 lists, each with 2/3 of the key. That way if I lose the device I can recover it by recovering 2 of the lists. The thing is, for the last year (and the foreseeable future) I have been living internationally with just a backpack and no physical apartment. This means I have no 100% reliable places to store the keys without relying on other people, like leaving part of the list at a friends/families house (unknown to them) which isn’t really ideal.

Also, because I’m frequently traveling on local busses and flights and staying in airbnbs/hotels it’s not entirely unlikely that my ledger gets stolen or lost.

I’m starting to think it would be safer for someone in my situation to store ETH on Coinbase. I have always been a huge proponent of ‘not your keys not your coins’.. but I think because of my lifestyle, and weighing the various risks of self custody vs. Coinbase, it actually may be safer to not be managing my own coins.

Am I losing my mind? Are there alternatives that I’m not thinking of? Is Coinbase really that bad? Any input would be awesome