One of the big three parts of a currency is that it is a good unit of account. For something to be a unit of account, people have to be able to compare its price to the prices of alternative retail goods. Since the value of a bitcoin changes so much, it would be hard and confusing for both the consumer and the seller to recalculate the prices every day.
It's actually very easy. If you link your online store to a BTC exchange it will automatically adjust the prices.
The Youtube video “Why Do Banks Fear Bitcoin” by VisionVictory explains that there is a set amount of Bitcoins and by the year 2140, there will be a total of 21 million bitcoins. Miners have already mined 11.9 million of them, and this means that there is only 9.1 million left. Once all of it is mined, there won’t be any more left to be mined.
Old news, we have 17 million mined coins now.
Dollar bills can be printed by the U.S. government if they were needed.
The problem is, the printing is being abused. When they have no money they sell bonds, then of course they have no money to pay the bondholders, so they print it. As a result inflation is eating all your savings.
Some more reasons why Bitcoins isn't a good medium of exchange are that Bitcoins transactions each take around 10 minutes each, which is very slow compared to using a credit or debit card, which takes a few seconds.
That's because when you use a CC the money isn't actually being moved. It's only being logged in the system and the actual transaction takes place later.
A similar thing is being done with the implementation of the lightning network. Transactions are processed off-chain and injected as a batch a while later.
So, CC transaction speed is almost there.
Also, Bitcoin transactions can cost around $20, which is extremely expensive.
It doesn't happen anymore. Pre segwit transactions had that problems. Again, old news.
Because of all of these reasons, Bitcoin can't be a good medium of exchange, which is very important if it were to be a legit currency.
All your reasons are very weak and easy to undermine. You need some better ones.
Bitcoin is an atrocious store of value and one of the reasons why is because of its constant hacking attacks and other security problems.
I've been using BTC as a store of value for years and i've never been hacked nor have I heard of any of anyone being hacked for that matter. Only exchanges get hacked, but those are private services with gaps in security. The bitcoin network has never been hacked!
This is mostly because Bitcoin is decentralized, which means that there is no central authority that can stop any Bitcoin transaction or any hacking attempts.
And there's no central authority that can make a mistake and lose your money. There's no central authority that can steal from you' just like they stole to bail out banks.