Why do you say bitcoin is going up so fast? It has actually remained stable around $8k and $8.2k for a few days. It had a drop to $7.8K if I'm not mistake, because of the tether hack, but it was barely noticed, and it recover back to $8k just as fast as it had dropped from that value. We didn't have any major developments recently, but I guess that the lack of bad news, is enough to boost more confidence around bitcoin. We even saw some South Korean banks, saying that they are planning on creating their own wallets for users to store their BTC there. Since a lot of people still thinks that banks and governments are BTC worst enemy, these news are actually good.

Another great thing, at least for me, is that every time BTC increase in price, and I go to coinmarketcap, and see the markets that are trading BTC, I don't see a single market/exchange having a major influence in BTC trading. This means that this is a genuine demand for BTC happening and not just a organized pump. If we do the same for bcash for example, and some other alts, we see that that most of the money is coming from KRW, and normally from one exchange, that usually is bitthumb (and this looks just like a pump to me, and doesn't inspire me any confidence).