I doubt that this year it will grow up to 5000, but 2500 is more possible.
Ethereum is going to transition to PoS very slowly and carefully, it will not happen suddenly with one update. PoS means that people with skin in the game (owners of the currency/asset) are the ones who secure the network, and this is something that will ensure the long term health of Ethereum, since decisions are made by people who will be directly affected by those decisions.
PoW on the other hand is so predisposed to centralization due to legacy economic conditions (cost of electricity), the only reason BTC, BCH, and LTC are not fully compromised by 51% attacks right now is because of a gentleman's agreement between the huge mining farms. Are you willing to bet your future on a gentleman's agreement? Are you willing to bet that the Chinese government will not try to pressure these mining farms in the future to do this or that? This is not even mentioning the end game of PoW once the max supply is hit, algorithm difficulty is high, and miners need to cover their costs through higher fees.
PoW has acted as an instrument of channeling money away from westerners and towards the Chinese. So our universities and companies produce the brainpower, our society pays the cost of R&D, and in the end our inventions from that R&D serve as a funnel to take money away from us and put it in other people's pockets. No.