There is a lot of hype among Amazon, Apple, and Tesla about accepting Bitcoin as a payment method. Many of them say that the adoption is better, but if the company converts a large amount of Bitcoin paid by customers into legal tender, it will give Bitcoin. The currency brings a lot of selling pressure.
You didn't think this over good enough.
Tesla "buyers" were mined or bought the bitcoins they'll spend there. So it's a buying pressure too.
This is how the coin part works. Some will buy to spend, some will sell when received. And some will hold. Just like now.
Bitcoin is limited. Everyone uses Bitcoin for payment and daily transactions. Bitcoin is becoming more and more popular. Many people know that Bitcoin also has countries that set Bitcoin as legal tender. If Bitcoin is used to pay salaries, is it necessary to collect taxes?
You are confusing apples with oranges.
Taxes are there to pay for the country's infrastructure, for public schools, for public hospitals, for the army and many more. You have to pay taxes whether you use bitcoin, USD or anything else as means of payment.
Whether the taxes are received in bitcoin or anything else is not a big thing either - again, bitcoin is a coin - if certain institutions also accept bitcoin, it's nice. If they don't.. well, they may do in the future.
Bitcoin is becoming more and more common for daily payments. If it is more convenient for everyone to buy bitcoins and use bitcoins for daily payments, will the price of bitcoins get lower and lower?
No, and I've explained that this "logic" is incorrect.
But now the legal currency has depreciated. For example, if you are rich, then you will not let your money just be stored in the bank, and will invest it in cryptocurrencies, houses, stocks, and others.
If conditions permit, I would be happy to use Bitcoin for daily payments, but some people have said that they will not sell their own Bitcoins and have been waiting for the price of Bitcoin to rise.
Do you think Bitcoin will be devalued in the future?
The legal currency is a piece of paper telling that the country "owes you" a certain amount of "value". The legal currency has the "value" the government/central bank decides for it to have.
Bitcoin price is decided by the free market over the world. And as long as there's demand for it (and if it's used there's demand) its scarcity should ensure that the price will not (overall, long term) go down.
So while I do expect the price still go "up and down and up and down and..." I don't think that it will be "devalued".