I'm sure it will last even in the altseason. Uniswap and Polkadot are already bringing a lot of new things to their ecosystems, besides, some investors are happy with the project. I'm sure uniswap and Polkadot will last at least the next three years. It's not too late to invest here.
Polkadot is just beggining to evolve so there are no talks about survival. November 11 is a starting day for parachain auctions so Polkadot ecosystem will receive a good boost.