TDIL Coinbase insures money lost from physical security, cyber attacks, and employee theft. they keep 98% of their funds offline. So back to my original point, is it really that important to keep your money off exchanges if they offer insurance and you personally make sure that your account isnt vulnerable to phone attacks? https://support.coinbase.com/customer/portal/articles/1662379-how-is-coinbase-insured-
It is better be safe than sorry. Nowadays a lot of evil people are lurking around and in the web ready to devour those easy targets. It is best that we buy hardware no matter how expensive it is, its way lesser than getting scammed or hacked.