I'm thinking about buying a chunk of NEO and just "forgetting" about it for a couple of years while earning GAS. Is the web wallet safe enough for this to hold? Of course I'm talking about storing private keys and passwords offline, etc... I'd probably barely log in.

The reason why I'm thinking web wallet over GUI wallet is... I'm not going to be paying attention to wallet upgrades or re-donloading the blockchain etc. Other than checking on the price of NEO I probably won't be too involved checking updates etc.

Comments, recommendations?

Thanks.