Only when the price or value of the coin drops, them would this happen. If not, there's no way this would happen. That's why most people convert their currency to more stable ones before transacting in this space.
Low gas fee of Bitcoin is a bit expensive compared to other cryptocurrency in the marketplace. I prefer to use all the coin for transaction. Litecoin is one of my favourite coin for transaction due to low transaction fee that comes with it.
The gas fee of bitcoins will be determined by so many things, normally now in which the current price of bitcoins is at 17000 dollars we are likely to have a lower gas fee when carrying transaction compared to when the price of bitcoins was at 60000 dollars