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?
To answer your question, yes. Anything that is collected as a means of income is subject to tax depending on the country where BTC is converted into legal tender. Any form of profit or income is taxable by the government and its respective rates depend upon the country.
As you call it and it makes a lot of sense. if there are many large companies that have an impact on the economy of many people will adopt bitcoin as payments, the demand will certainly increase and with limited coins the price will also increase. not the other way around. because not everyone using bitcoins for transactions. nowadays more people are used to long term investment or trading, so its balanced between people that using it for investment and for people who use as payment.
Like what OP said, in order for this to happen, it is essential that BTCs must be converted to legal tender. But, even without the implementation of it, companies may still adopt it as a form of payment to their products/services due to its widespread popularity over the years.