This has more to do with the regime change in the US than you might think. Democrats/liberal values are spread over the most part of cultural and news business

This has more to do with the regime change in the US than you might think. Democrats/liberal values are spread over the most part of cultural and news business in the US, and when they are in power, talks about a brighter future is always in vogue. If you look at the tech hype cycle, the first bubble happened on the end of Bill Clinton's government. Now the same thing happened at the end of Obama's, although it didn't come as a stock crash.