The beauty of crypto currency is that you cannot print it out en masse, quantitative easing style. They have to be "mined" and there is a corresponding cost in time, IT labor, the computer hardware and the energy consumption to the hardware.
scarcity is only one of criteria that determines if a material can be used as a medium of exchange. And it ranks lower than other criteria, such as physical existence, durability, convenience in use, acceptance by the populace, readiness of verification, practical uses, ... etc.
Human societies used shells, stones, salts, tobacco, seeds,... etc., as a means for business settlement in the past. They faded out because they can't meet all of the criteria. Crypto-something, I even don't want to associate it with the word CURRENCY because it has nothing to do with sovereignty, which is the number one requirement for something to be called currency, is a trash, or a fraud of money laundering. As a means of payment, crypto-something is even worse than a rare shell, or tobacco, or rice. You can still settle an exchange by using them in a place where electricity is not available, but you can't use Bitcoin to do so because Bitcoin doesn't even exist in a non-electricity, non-computer, non-Internet environment. (And even if you have electricity, have a computer, and have access to the Internet, you still have problems to prove the authenticity of your payment of Bitcoin, leave alone to convince the seller that your payment of Bitcoin is endorsed and protected by a sovereign country.)
You can spend your entire life, energy, and wealth, to produce something very rare, but the VALUE of your final goods doesn't parallel with its rarity, or with the amount of your investment. Come back to common business sense. Don't be fooled by something that has a showy appearance.
All that glisters is not gold. - Shakespeare