The income earned by miners for processing transactions vs the standard block rewards is now at 6.13%. This is probably the most important number to track, and should continue to grow. Very occasionally a single block will reap more in fees than the reward, but on average we are still a long way off.
By the time this gets to 100%, BTC / BCH / ETH are all toast.
The other number to watch is the typical 300:1 price difference between BTC / BSV ( currently at 298 ). Once that number starts to break down, you will know the market is starting to correct, and apply proper values based on utility.