As we understand, liquidity refers to the rate at which you can easily sell an asset or investment and convert it to cash (this is the best way I understand it). Some investments include stocks, cryptocurrencies like Bitcoin, real estate, high-end wristwatches, and more. Bitcoin is highly liquid because at any time of the day, year, or at any place I am, I can easily sell my Bitcoin for cash. However, Bitcoin and other cryptocurrencies are also very volatile compared to other assets or investments. Yes, they are liquid but not necessarily non-volatile. Can I, therefore, conclude that the higher the liquidity of an asset, the higher its volatility?
Liquidity doesn't limit to sell or convert assets, it also means ways to have quick access to cash but in crypto, you are right about that, enough liquidity means you can easily sell or convert to cash without having any form of difficulty in doing it.
I think liquidity of bitcoin is subjective to people, the fact that I have 1 bitcoin and I can be able to sell easily doesn't mean that Micheal Saylor can do that because as of today, he has about 158k bitcoin under his holding and if today he moves that bitcoin from one wallet to another, people are going to panic and will want to sell all their own because they will think that he is about sell everything and cashout from his investment and that alone can tank the price for that influence with huge volatility. Elon Musk also did sell some of part of their bitcoin reserve because of same liquidity challenges.
I think Bitcoin is huge but let's keep bringing more and more investors and build large empire of investment, a time will come that we will not care about this liquidity again because it will be available more than enough and bitcoin volatility will be low by that time.