Yes, if rich people buy, they certainly have to buy too. If we have money, for example... if we don't, just be patient and wait until we get wages to buy. 
Buying BTC when the price is dropping is a good thing because we'll get a lot of BTC. However, I think buying when the price is rising is also fine, as long as we intend to hold it for the long term. In my opinion, buying BTC using any method is certainly a good idea because BTC certainly fluctuates, and we can certainly take advantage of those fluctuations. However, in BTC investing, I think the most difficult thing is the temptation when the price has risen high and we suddenly want to sell it. Of course, I think that temptation is sometimes difficult to resist. So, in essence, I think that temptation is difficult to overcome. Of course, currently, many people regret selling their BTC at prices like $70,000 or $100,000 because they thought it would drop again, when in fact it didn't. The point is, a strong intention to hold and retain BTC is certainly one of the keys to successful BTC investing.
Buying BTC when the price is falling is a must for those who are already familiar with Bitcoin because they don't want to miss out on accumulating more Bitcoin. But if they use DCA to invest in Bitcoin, they won't pay much attention to the price. They'll simply focus on buying at specific times and then holding on. They won't be swayed by temptations like selling when the price rises, because their goal is long-term. They could have sold their Bitcoin at $122,000 yesterday, but those with long-term goals won't be tempted to sell. They'll hold on until their target is reached. But some people sell some of their Bitcoin to take advantage of their long-awaited gains, and that's not wrong either. They have their own plans, and they'll certainly be different.Buying BTC when the price is dropping is a good thing because we'll get a lot of BTC. However, I think buying when the price is rising is also fine, as long as we intend to hold it for the long term. In my opinion, buying BTC using any method is certainly a good idea because BTC certainly fluctuates, and we can certainly take advantage of those fluctuations. However, in BTC investing, I think the most difficult thing is the temptation when the price has risen high and we suddenly want to sell it. Of course, I think that temptation is sometimes difficult to resist. So, in essence, I think that temptation is difficult to overcome. Of course, currently, many people regret selling their BTC at prices like $70,000 or $100,000 because they thought it would drop again, when in fact it didn't. The point is, a strong intention to hold and retain BTC is certainly one of the keys to successful BTC investing.
I disagree with you on this, buying Bitcoin when the price is down is not a must for those who are familiar with Bitcoin investment but rather, it is vital they take advantage of that opportunity if they have... When you said it is a must it means they will have to invest whether they have money at that point in time or not which is wrong and remember when you over stress yourself or when you are not buoyant and you force yourself to invest you will surely pay for it in a hard way. Lastly, this statement can somehow mislead a newbie that doesn't know anything about Bitcoin investment, because some newbie always take anything they heard most especially if it is from a senior colleague ( someone ahead of them).
I also agree with you on this. You should never invest under pressure or emotion. If acquaintances, friends, relatives, and those who are associated with Bitcoin buy Bitcoin at a low price and share it, then we, the new ones, invest without thinking about anything to protect our dignity in the face of emotion. Then we take out a loan to buy it in a hurry. But we do not know what Bitcoin is and how long it is necessary to hold it.
As a result, we need money a few days after investing to repay the loan. At that time, we are under a lot of mental stress. Then that investment is of no use to us. So, not under any pressure or emotion or compulsion. To be a smart investor, it is necessary to invest according to your financial plan and understand the risks.