I lost my wallet, can someone just help me with my investigation?
too many clues means no clue at all. there isn't no clue. you already said u changed laptop manytimes . just forget about. you can't dnothing without the backup.
but if you using some online wallet to receive that btc. you can search your email to see if there are record fromexchange or online wallets. this is the only chance. good luck.