IMO this is a selling opportunity. If you really feel that you want to be involved in crypto then I would research alt coins and create a diverse portfolio, putting either nothing into bitcoin at all or at most, a very small, speculative position. I don't see why bitcoin warrants the highest market cap in crypto when it has technical shortcomings that have been solved by many other cryptocurrencies. First to market does not mean ultimately coming out on top, as has been proven over and over again.