OP, if you generated your wallet online, directly on their website, I recommend you:
1* download
https://github.com/pointbiz/bitaddress.org/archive/v2.9.9.zip2* disconnect from internet
3* delete browser cache and unzip the folder
4* start it: bitaddress.org-2.9.9/bitaddress.org.html
5* generate couple of wallets and print them in 2 copies each
6* split 10 BTC from old wallet to more new wallets than one, five should be ok (you can use smartphone with mycelium for this action)
7* distribute wallets to 2 different safe locations, one copy to each one
8* delete folder bitaddress.org-2.9.9 broswer cache again
9* connect back to internet
you know, better safe than sorry and related to bitcoin, this is valid 10x more..