As long as central banks all over are pumping trillions into their respective economy, markets will go up as a non negligible amount of that money finds its way into equity markets.
The other big difference between 2000 bubble and now is that none of the big companies trading at irrational multiples (think Tesla) have a big risk of going bankrupt in the coming quarters while in 2000 an entire sector went down with a lot of big names with NO real revenue just disappeared.
Going short now is risky, doesn't pay to be right too soon in the stock market. That doesn't mean the road won't be bumpy in the near future...