The era of paper money is coming to an end, IMO.
Soon it will be entirely replaced by electronic/plastic analogues.
Oh look like you thinking is way too much. Paper will money will exist in decades. Virtual currency are meant for virtual transations same with fiat currency are for fiat transactions.
No way virtual currency can touch physical transaction without an active internet network.
Yes paper money will always exist and survive and I don't think it has any threat from paper money in future, as the customers of paper money are more in compare to bitcoin.
Try to think of it from another angle.
The world is moving into ecological crisis. Deforestation is an actual global problem.
If humanity has already accepted plastic cards and digital wallets, why not stop producing paper money, bit by bit, and by this reduce wood consumption?