I’m considering that but I don’t know where to find an authentic and real cold storage wallet here in my local..but I’m still searching for it, I hope I find one soon because I am trying to hold it for as long as I can..
You should consider using multi-signatures to strengthen your security, and if you want to store your coins for a long time it would be your best option, here the important thing is your seed, the backup of the wallet is only a backup, the security of the seed is stronger than the wallet file itself in general, because I assume that remembering the key after so much time, indicates to me that it is something relatively easy to guess (or to brute force).