I am planning to run a Coin's ICO for several years, not interested in the gains to be made from selling out ICO in 3 days NO, but interested in using the COin to end Global Poverty as i deem fit. So a lenghty ICO is one solution. That said I want to know if its possible for the coin to be liquid during the ICO of like 2-4 years. If it is possible for its liquidity then suggest how that can be done please.
It could, but liquidity during ICO (meaning you can buy and sell tokens before ICO ends) could lead to many economical problems. For instance, if people could buy your token on exchange - they will not buy it on ICO, so you will not get funds you need for the project.