Buying bitcoin at lower than $30k is a very good decision, but only if you are optimistic that in the future the price of bitcoin can recover to its past ATH. Anyone who bought for less than $30k back then, they're getting a good return now because it's already over $31k.
They buy at a price of $30K and then bitcoin recovers at the previous ATH price, so they get 2x more returns, or if bitcoin hits a new ATH price with $100K, that is my shadow, returns can be 3x more, it is even very possible because history always records that bitcoin in the end hit another high.
Because there is a lot of speculation about the future ATH price starting from 100K - 150K - 200K they can predict, we draw the most likely conclusion that bitcoin can return at a price of $ 68K then our profit from bitcoin has doubled.
Although return from a bitcoin investment are never guaranteed, history has proven that returns are very possible. In fact, I firmly believe that it is always possible for bitcoin to surpass its high for a certain amount of time, for example after a halving. I thinks, some investors in the last year have received 100% return on their investment, especially if they had bought at the lowest price at that time.
I've noticed that bitcoin has a habit of scoring 3x higher every time it hits a new ATH. For example, when bitcoin minted ATH in 2017 it was priced at $20k, whereas in 2021 ATH is priced at $69k. So based on that, I think there's a chance $200k will be the new ATH after the 2024 halving. But either way, we never know what's going to happen.
I can't imagine how much return MicroStrategy has made on their bitcoin investments so far, but they don't seem to be content with everything they have and continue to do so on an ongoing basis. But bitcoin can be bought at any price, but if you doubt the price can fall any lower then of course you should have a good plan like DCA or something.
It's a company they have a lot of capital and of course they buy a lot of bitcoin, I imagine that microstrategy will get hundreds of millions of dollars in returns when the bitcoin price returns to ATH, well it's very possible they have a lot of bitcoin in their wallet.
The simple way is DCA if we can't afford it by buying a lump sum, it makes it easier to continue to accumulate at any given time, I think the DCA method is used by more people to increase their bitcoin.
The investment strategy really depends on the individual user, but I like the way MicroStrategy does it. They adopted a DCA strategy, which is good for the long term because when prices go up it's clear they're going to get huge returns.