It was no joke, I actually did the calculation:
Current Bitcoin price: $15.000
Reasonable Average Lambo Price: $300.000
So for 1 BTC to be worth $300.000 we would need a 20x
If you have a somewhat fragmented wallet you can end with a $100 fee right now for "premium delivery". Note: You are a Lambo purchaser, so you don't want to look cheap, you go for premium of course.
$100*20x=$2000
Well, I have seen good condition second hand Fiats for less. So, there you go, 1 Fiat fee for a 1 Lambo purchase.
P.S.: Some figures slightly rounded for easy of comprehension. Some additional factors that could worsen or alleviate network congestion not taken into consideration. No animals were harmed during the making of the calculations. This is not investment advice.