The marked cap for BTC have increased from 60 to nearly 120b$ since september. In the meantime, the total market cap (BTC excluded) is somehow stable, only 10b$ have gone out of altcoins in the same period.
altcoins are mostly having bad time because their bubbles are busting and they are in the downfall of the year now. bitcoin is rising because its adoption keeps increasing and also there is a bubble forming up now.
Where do you think the money that goes into BTC comes from? Margin trading? New money?
Do you know something by fact and a link that can support it
it is impossible to say for sure, it is mostly because of all the free money that people have been receiving this year from all the altcoin pumps that is not coming back to bitcoin.
it is also the fact that many are not familiar with bitcoin. the news is literary filled with bitcoin, everywhere they are talking about it. that is bound to bring in a lot of new people and new money.
there is also the latest news about CME and getting involved with bitcoin thing.