I think that every hour mining bitcoin becomes less profitable and more complex. Tell me yours opinion guys plz
you are wrong.
bitcoin mining is always at the same level of profitability more or less, at any time in the past, present or the future. and that is because how the difficulty works.
if difficulty goes up it becomes harder to mine bitcoin. if the price stays the same or drops miners will leave and difficulty comes down and it becomes easier to mine bitcoin.
if difficulty goes up and price goes up it becomes more profitable to mine bitcoin so more miners will join and difficulty goes higher until it reaches a balance.