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It seems that every altcoin has its difficulties to scaling up, mostly the solution is POS.But it is hard to control the speed of the inflation in POS, so lastly a new altcoin will come to the market for alleviating the problem. It is just a vicious cycle....

it touchs to 450$ this month

I think we're going to see a pullback of up to $50 in the next week, especially with how bullish it's been over the past few days, a correction is going to happen it's just a question of how high it will go before then. In the long term I think Ethereum has a very long way to go and the likely pullback in the near future will offer a great time to buy!