Sell 4080 or wait for 6090

Should I take advantage of the current shit show and sell my 4080 for profit and then just wait for a 5090 restock (I'm fine gaming on my ps5 while I wait) or say fuck it and hang on to my current system and build a completely new PC when the 6090 releases in two ish years? I play in 4k and lately new releases have been bringing the 4080 to it's knees..