Is it time to invest in Polkadot?
Yes for investors, but no for traders. Currently almost all alt has been dumped by investors/traders and focus or switch to BTC. Before you miss the train, DOT is very suitable to put in a bag. I believe in Polkadot (DOT), this project is very ambitious. Many people say that DOT will put ETH position sometime in the future, because basically ETH 2.0 is too much delay and can be said to be too late. this is just my opinion. But until now it remains "ETH The King Alt".
In the past, there have been many coins claiming to surpass Bitcoin or ETH, but up to now, there is no one that can do it. The majority of projects declare this to be just to advertise and entice investors.
Maybe in the future there will be a project that will actually replace ETH, but I don't think it is the Polkadot project.