There are many arguments for and against Bitcoin. Only time will tell.
But I have three comments:
1. Personally,
I would probably be - out of self interest - a strong supporter of Bitcoin if I had any, or would have belonged to the first miners. But I have no BTC, and such I only observe as a bystander how this technology develops.
2. Energy and intrinsic value of BTC
For me, the argument that cryptocurrencies can be made out of thin air and thus BTC is just some digital data does not hold. Gold can be mined from many sources as well (e.g. in can be found in the oceans as Au2+). Or another currency can be created and printed/minted.
However, with a currency such as BTC it takes a lot of energy to fire up such a system until a certain level of penetration is reached, and it takes energy to maintain it. Actually, this is one of the greatest drawbacks I see: every BTC that is created now now will be more expensive in terms of energy cost. I prefer a one time energy and material cost for the creation of a currency, and minimal energy/material costs that come with its operations.
3. Penetration and access.
I wonder if it might not have been better to distribute all BTC among all of mankind. That way, everyone would be in possession of an instant amount of currency and could readily engage in trading. The early mining process support the creation and distribution of bitcoin but gives extreme gains to early adopters. A better initial distribution might have helped to position BTC as the dominating cryptocurrency. Right now any follow up can beat BTC if it excels the parameters that define the adoption and usage rate of the currency as trading medium.