Basically, if you lose it or someone still from you the key, the fund will totally be gone and no way to recover it again. The next time you store your coins, ut would be better if you'll have secure backup system. Like HODLER wallet, they have a feature called HODLER Secure Backup (HSB), it is an innovative feature developed by HODLER team. It will allow the user to create a backup of their seed alternative to the standard paper backup, it create a PDF file containing QR code of the seed and then packed as an encrypted archive.