Or you just encrypt it properly and with a secure password you have memorized, and upload it to a cloud server which you trust will not disappear all of a sudden and upload it there. Then, you decrypt it every know and then to check the files integrity and that you still remember the hash. If you ever believe the account might have been hacked, you just move the coins to another wallet just-to-be-safe.
Another alternative (if you are not good at remembering passwords) is to give a piece of paper to a family member or good friend with the key and tell them to store it safely. This is no different then giving them a spare key or give them authorization to your bank account/deposit
There are also tools that allow to take your seed and split it in m subgroups so that you need at least n out of m to rebuild it. So instead of giving password to a single family member (or two relatives, half and half) you can give it to more people and you can still recreate it even if some lose it
Another alternative (if you are not good at remembering passwords) is to give a piece of paper to a family member or good friend with the key and tell them to store it safely. This is no different then giving them a spare key or give them authorization to your bank account/deposit