LUNA that you invested has failed, but ETH, ADA and DOT will definitely last until 2026, in fact the price will definitely continue to increase when the bullrun occurs, therefore you don't need to worry about investing in ETH, ADA and DOT, because you will definitely get profit in the long term, but for THETA and AVAX I can't give an opinion, because I only know and invest in ETH, ADA and DOT.