Maybe other participants of the forum will try to dissuade me from buying this coin?
Since you asked for it, here you are:
For me all investments in PoS coins were a disappointment. All this happened before 2018.
And it makes sense. Just imagine, for Ethereum: in the past 2 years whoever wanted to accumulate, had plenty of opportunities to buy. After becoming PoS all these whales will have
free coins to dump/sell.
Will this make the price rise or fall?

I do not think that the whales will immediately sell the ETH that they will receive as a reward for holding coins. why do they need it? if they will dump the price of Ethereum with their sales, then those coins that they froze will cost less and their losses will be much higher than incomes. it is quite logical and therefore I do not think that POS will be a bad idea.
I also plan to buy Ethereum, but not now. I expect lower prices than we see now