anyway you probably know so im debateing on making a purchase for coin on cex.io so if i go through with buy coin weather it be LTC or BTC idk one of the 2 but my question is does the source matter at all if i have my fiat currency usd because all of this is very confusing bbecause im trying to findout if it matter what source it is i pick on electrum to recive from cex.io because im trying to purchase some coin and buy some production gear and the person is only exepting crypto as of a payment and im wondering if when ibuy coin from cex.io and send to my recive address if the fiat " source " matters on what i put in the box i hope i could make any kind of sence to what im trying to say but i hope someone can really help me with this