It is important to distinguish between short and mid/long-term view. In short term I think Btc might decrease at the beginning of 2018 first, then it will be a good time to buy. Referring to altcoins, you have to look at each single one and analyze it if investment is promising.In general, in mid/long-term it is probably a good idea to invest in Btc as the value might further increase due to even more public attention.
Public attention means more users and investor but it also means more temptation to regulate and speculate. If BTC keeps these price levels, it won't be long before governments/politicians, pressured by bankers/brokers will start to intervene.
Is this proves to be a bubble, then it will be a significant blow to all the crypto reputation and credibility.
If BTC and general crypto prices keep on rising, then some of us will be very happy for some time but it won't last long.
Now the price of bitcoin is pretty low, but I think it will be more logical to buy bitcoin at the more deep correction. I think that after a correction, bitcoin will start to rise rapidly up to 30-50k
If BTC rises rapidly to 50k, we have to ask ourselves where is the money coming from?
Take a look at these figures:
BTC market cap: ~263 B
Cisco Systems Enterprise Value: 155.85 B
Intel Enterprise Value: 236.72 B
Just to name a few, ok?
If we look at the top 10 crypto, we have to wonder... WTF??? How can these assets be more valuable than some of the greatest tech corporations?
Let's not get too enthusiastic bout all of this, shall we?