With segwit the tx fees are reduced by 40% (found online).
Actually that depends on the transaction structure itself (total input, total output, script size, etc.). But on some cases, it's true.
So my question is the following :
If I load some legacy addresses (paper wallet for example or vanity addresses ) with some low amount of crypto ( $50 to $100).
(They are going to be birthday presents for family members in 5 to 10 years).
When they will want to redeem the coins to a segwit or LN compatible wallet, what kind of fees are we expecting?
It's hardly predictable (especially we're talking few years in future), there are few important parameter/variable :
1. Transaction size. Upcoming technology such as Schnorr Signature will reduce transaction size on transaction with more an input.
2. Minimum transaction fees allowed to be broadcasted. Currently it's 1 sat/byte, but there are plans to reduce it.
3. Maximum block size
4. Average transaction per second (TPS)
5. Total unconfirmed transaction
But obviously it will be higher than redeem/spend coins from SegWit address.