Look at all the truly rich people in the world. Whenever they talk about their wealth they say "oh, I may be worth billions, but actual liquid funds aren't very much at all", they tie them up in bonds, stocks (typically of their own company) and other investment vehicles. They'll keep a certain amount, maybe a few tens of thousands, as readily accessible liquid funds, but any more than that is a waste as liquid funds do not work for you at making more money.
erm bonds, stocks (assuming we're talking exchange traded equities) etc.. are liquid assets.....