However, Etherium is not advisable for short-term and day-trading activity - it is for long-term perspective.
it is funny how you say this and then immediately contradict it in your screenshot! the fact is coins like ethereum that are getting pump and dumps (not bull and bear market) are only good for short term trading and not much else.
for instance your chart is a very good indicator of that. in that big dip after the big dump the market is in shock of the big drop, for example when price got dumped from $1500 to $1000 and the newbies would rush to buy it thinking they got it cheap. buying in that dip and dumping it fast (short term trading) can give you a good profit, but buying in that dip and holding (long term) means losing a lot of money as it has another dump from $1000 to $800 for instance and then lower and lower....
and this has been the case for all ETH history. specifically this year. people like you have made the mistake of saying "it is time to buy" and then they got dumped on and lost another 20% of their investment because they bought in the bubble.