For your 100000sat to be all spent as fee, you're looking at a fee rate of around 900sat/vB (SegWit 1in-1out transaction)
As long as the future wont reach that ridiculous fee rate range, your paper wallet wont be worthless.

If the future's mempool condition is your concern, then it depends on the future implementations and adaptation of the second layer.
If things will be the same, it wont be too different from today's condition, if not only a bit higher/lower.

If the fiat price is your concern, then the price of the fee will increase with your paper wallet's price.
In this case, you're worrying for nothing because for example, a 400sat absolute fee will still be 400sat even if Bitcoin's price increase, only its fiat equivalent.