I will advice you to take a look at top 20 coins according to coinmarketcap and invest those funds on them for a long term investment.
the best solution for such large capital is indeed investing in the top coins on the coinmarketcap list, it's better to just invest in some coins that have profitable growth potential in the future or when the market has recovered
besides, it is also far from the risk of losing a lot of money invested because the top coins have a large number of market capitalization and have been trusted by the people who invest in them.