Even if the gas fee or transaction fees are higher in future, have you forgotten that the value of Bitcoin and Ethereum doesn't stay in one place forever? So why did you ask that your 0.001BTC would be useless in future? Here is what I believe could happen.

1. Your 0.001BTC will surely be worth more than it is now, still worthless?

2. The transaction fee of Bitcoin can indeed go higher because of high value and ordinals but, that's just in few days of few weeks of massive pump, you can still sell later to avoid massive high transaction fee.