In this case, I would probably first divide this amount into different wallets. On many wallets, with different balances. That is, I would do what is called risk diversification. Also, for storage, I would use various options: from physical methods (e.g. described here Securing Your Seed Phrase with Washers) to using hardware wallets (various manufacturers). The part BTC that will be stored for a long time would be placed in a more inaccessible place (divided seed-phrase into several parts in different places, for example, in a bank cell), and the other part would be kept at hand for current needs.

To be honest, with such a significant amount as 2000 bitcoins, it seems to me that other methods will already be required, because the price of the bet is very high.