Then no one will ever gonna trade cryptocurrencies. The Internet is essential in crypto world, without it we cannot connect to other people across the world. Also, electricity is as essential as the internet. Without electricity then no internet. And no trade at all.
Bitcoin, or any other cryptocurrencies, greatly relies on the internet. Since it is a digital money, therefore, it can only be accessed with the presence of internet. Without electricit , there would be no internet. Without this, we can not access or use any of our crypto. Trading would not be possible.
Even if there is no electricity, we can access bitcoin and other crypto currencies using alternating options such as solar energy. There are many ways through which kinetic energy, potential energy and all that jazz could be converted into electricity. There are many companies that are already working on these projects. So most of the people would be able to access their wallets and trading sites for earning huge profits.