in fact it only happens to some of the wallets that do not have credibility. Coinbase is a big exchange for Americans and they only support them, in addition to foreign users will be easy to lose money and not supported. This is one of Coinbase's weaknesses and that's why it doesn't make a lot of impact. Right now, we have a better centralized wallet, Blockchain. I have tried it for the last 7 months and did not have any inconvenience and it is very safe.