I understand that someone might feel that crypto will become more tangible with banknotes, but the truth is that cash is slowly disappearing from the society, why would crypto need to go the opposite direction? future is cashless
The actual truth is, 150 billion banknotes are printed every year and growth is at 9% much more dynamic than global economy.
Think about Tangem Notes as a familiar and secure physical interface to blockchain technology that enables more people to use it. Most of the «cashless» technologies you're thinking about are incredibly centralized and controlled. For actually decentralized ecosystems, a lot more tools need to be invented, scaled, and given to the people. Tangem is one of them.
It is absolutely impossible. Not only because of hundreds of technical issues that would arise, but more because of the idea that such modern currency would use such outdated representation. It would be absolutely inefficient and uncontrollable. I would say that this currency should stay in the electronic state, at best - on cards or phone apps.
The concepts of «cards» or apps you're thinking about are inherently backed by centralized companies. Crypto is about decentralization, trustless ecosystems, reclaiming control. People need to have finer grain control over their digital assets now and a smartphone alone cannot do it without siloed hierarchies.