The tactics that Americans use are very common. When they buy up all the Bitcoin on the market, and all the Bitcoin is in their hands, they have the power to dictate the price fluctuations. That's why you see MicroStrategy, buying at 30,000, daring to buy at over 60,000, and daring to buy at over 100,000. This is the reason. Even if they buy at 500,000 each, as long as the general direction continues to push Bitcoin up, they can buy without hesitation.