When that happens, many of the users here called that a lost coin and this coin will never circulate again, The bitcoin supply will truly lessen and if the supply is less, then surely the price of bitcoin will surge.
Not really. Because we'll have no idea whether that person is dead or not. The only time you can be absolutely certain supply is lessened is when coins are sent to a publicly known burn address.
i am not sure that we can technically be sure that the coins in the known burn addresses are unspendable!
but the only 100% sure that i know of which leads to making some coins really unspendable is to put it in a OP_Retrun output. because it is possible to set an amount for it and it is 0 wherever you look but it can be non zero and it will effectively "burn".