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Sir, when someone follow a trend, there were many ups and down. But this technology is very good for people who have low paid jobs. They have to invest small amount of money, to gain big.

In theory yes...in reality not really.
Never forget that in order for 1 person to earn X amount of money, 1 or more persons have to lose it.
Bitcoin was good way to earn with small amount invested...but only in the early stage when the price was $1 and than sold at $10k+ but buying it today, for $6k hoping it will go to 100k or more is insane...
But, if you love bitcoins and earning with it, I may have proposal for you.
I can sell you 50k bitcoins ~5% under price. Token by token. You buy under price and sell for full price...Interested?

No not now. Currently i am under saturation neither loss nor profit. When i will earn some then i will.