This is probably why Satoshi decided not to touch the over 1 million bitcoins in his wallet for now.

I'm sure BTC-millionaires will be able to find loopholes and ways to avoid paying inheritance taxes. Do traditional millionaires somehow manage to do this, or do you really believe in their selflessness with their charitable activities?  

There is a simpler solution: if you are a BTC-millionaire and don't want to pay taxes on it, then simply don't cash out bitcoin (don't convert it into traditional money) and pass it on as an inheritance in the form of bitcoin.

In my opinion, the nature of bitcoin so far allows to avoid any taxes (no tax on ownership of bitcoin and inheritance).

I mean giving away your Bitcoin is not going to make sense at all since it's not going to be your money at all, it's going to be a better move to pay tax since it still going to be a huge amount after paying taxes, even though the taxes are going to be huge as well. I mean a giveaway some of kind or something like airdrops might actually work for sure but it's going to be a lot of work, plus there was for sure some potential of seeing this as a strategy on avoiding tax but it surely might work. We can surely look at charity where it doesn't really take taxes I mean that could easily be a way for sure, It just way too noticeable to see this kind of strategy especially if you're going to transaction millions and billions of dollars worth of Bitcoin. But I guess with that kind of amount of money it is better to pay taxes just to be safe because surely it will be a huge lawsuit and worst you gonna get criminal charges for tax evasion which as a billionaire you don't want to happen because it can easily cause you everything as soon as they find it out.

Personally, with thousands of dollars of transactions so far I didn't get any notice, when I was just a student I had a lot of big income transactions of thousands of dollars which is for sure not going to be achievable for someone who is just a college student, surely is questionable, especially on the banks. But so far I didn't have issues converting my Bitcoin to fiat money. But I have a friend who got his account frozen with a much higher amount in the bank. So I guess it's better to do it on multiple micro-transactions than just cashing out at once since it is going to attract attention for sure.

It's true that donating your money to charity foundations will lessen your tax. But you need to donate it to charities, non-profit/non-government organizations, anything that is registered as charity foundations. Your example of satoshi giving away its bitcoin is just giving away, plus only a few countries taxed bitcoin, or i don't think it's necessary to declare all your bitcoin holding to revenue office just to become a law abiding citizen,  you will probably just declare a few just like most of us and businesses.

Though it's true, I don't think a millionaire or a billionaire will be happy to lose its assets by giving out to people just because of tax in future. IMO the billionaires are very smart and they do things smarter ways because that's how they make their money. There is always another alternatives to pass through those state even when you don't want to pay taxes. By the way, given out your wealths to people is not a way to manipulate in a way for you not to pay tax, I believe that there's other ways, besides if you are a billionaire that makes legit money there's is harm in paying tax because he tax you pay today will not stop you from making more money.

Agree, the super rich have ways to avoid paying tax pay as little tax as they
can manage. They have the wealth to employ specialist accountants with the knowledge
they need. They also are able to purchase high value items as a business liability and with
profits and therefore pay less tax. They would rather change their car every year from
profits rather than pay that tax. Investing and trading in Bitcoin can also be classed as
part of a business activity I'm sure.

The last thing the wealthy do is "give away" wealth other than for charitable donations.

People are just different. Some are willing to give out to charity which most of the world billionaires are doing. There are ways to avoid tax but some people wouldn't want to cut ways. Besides, there are different tax rules for different countries. While some are strict, some are flexible.

Not many people will like to move from the country of their origins and the source of their wealth, maybe for security reasons.