I am happy as you all for reaching $6000.
But I am worry about the crash in 2018!
Reason:
1- Only bitcoin from all cryptocurrency is moving far far away from all other coins.
2- Ether is moving slowly up and steady.
3- As we are all aware 2/3 of all high profile ICO either are scams, or legally scams to be announced.
4- At least 3 from $50m + raised ICO are having problem executing!
5- EXCHANGES..EXCHANGES...EXCHANGES...THESE ARE THE TICKING BOMBS..
i am not too worry about the crash in 2018 because if its happen then its only repeating from previous and we can see many like this in future. but yes the price will be down as we know that bitcoin price is always changing in every time. bitcoin is moving because now many people is trying to join into bitcoin world and they buy and sell the bitcoin to make sure that are in the same boat like the others. for the altcoin especially for ethereum, i am sure that ethereum will be increase soon once bitcoin reach the stable price. for the ico, i think if we are not sure, then you don't have to join and invested in the ico and its better to saving bitcoin. the exchanges will always have the competitor and only the best exchanges that will survive. so my advice, you don't have to worry about anything, just follow the market and you will be fine.