I think this article would answer that.
Why 92% of Institutional Investors Store Crypto on ExchangesHowever, although things have improved since 2018 (the institutional crypto custody space now has well-renowned participants like Fidelity, Coinbase, and ICE’s Bakkt), a recent study conducted by Binance Research found that institutional investors don’t seem to be using these custody services; instead, 92% of the institutional investors that responded to Binance’s survey said that they prefer to keep their crypto exactly where most experts least recommend--on centralized exchanges.
When I saw this text, it horrified me and the first thought that came to me was
“have they gone completely crazy”? It's complete madness to store cryptoassets on exchanges. This takes away almost all the benefits of cryptocurrencies.
As we can see, they place trust in major exchanges with the money entrusted to them. I can understand the reasoning behind this; an exchange that operates daily is more susceptible to hacking. The fact that they continue to operate reflects the effectiveness of their security measures. Additionally, I believe exchanges like Binance offer insurance on the funds deposited with them. In the event of a hack, which has occurred to Binance before, the SAFU fund, if I recall correctly, would come to the rescue.
But after reading the post to the end, I came to the conclusion that completely different rules apply for institutional investors. Or rather, they live differently from small crypto holders.
In essence, institutional investors use cryptocurrencies like some kind of stock market shares and are a speculative instrument. Therefore, storage also turns out to be original and appropriate. Shifting the responsibility of storing crypto assets to exchanges, even in a sense, into the hands of institutional investors. No matter how paradoxical it may sound, the risks with secure storage are reduced, because they place all responsibility on the exchange and hope that the exchange will enforce guarantees (compensation for damage in case of theft or hacking). Also, in this case, there is no need to create own secure storage system, maintain it in working order and bear your own risks. It seems that institutional investors are even better off this way, unlike ordinary cryptoholders. Although, for sure, there will be many of these among ordinary holders. It seems to me that the cryptoindustry is increasingly becoming centralized and dependent on big platforms like binance, which is not good at all.