It is the pioneer in cryptocurrency so the buyers think that bitcoin is safer that those new cryptos. It is the best investment for those traders because of high growth rate. And no one owns bitcoin unlike those ICOs that are potential scam.
For me, what makes bitcoin better than the other coins is for being more accessible. It is the store value if all altcoins. Altcoins needs to be converted into bitcoin so that it van converted into fiat.
And also, bitcoin is the most valuable cryptocurrency and asset to own.😁😊😊
Yes I believe a big part of what makes bitcoin so valuable is it's USD like status within the crypto markets, being a store of value coin with a deflationary supply this gives markets assurance that btc should maintain it's value over time.