I think this is a crazy achievement for Bitcoin, with a total market cap of 1.42T vs the silver market cap of $1.38T right now Bitcoin is worth more than Silver.
And is crazy to think, How a virtual asset can be worth more than a precious metal? It's crazy times that we are living in, and money and value are just losing sense. Markets decide what should worth a lot and what should crash.
I know people would have been checking the market capitalization of Gold when Bitcoin was moving higher but Gold did the more surprising things by adding more trillion dollars this time to make people shout their mouths, or else, the comparison will be more. Now is the turn of Silver since they see it as a weaker Gold. Well, the market capitalization of Silver can never be more than that of Bitcoin over time, it is an easy prediction as Silver has always stabilised around a little above a trillion dollars, and of course, we all know that Bitcoin would surpass it with time due to how people and institutions are focusing their attention on it.
But I do not see any craziness here as you claimed and it doesn't have to be a physical asset before people would appreciate it. Gold, Silver and any asset that is expensive today are so because people appreciate them and give them relevance through the money invested in them. The same is applicable to Bitcoin irrespective of whether or not it's physical. This is people's money on a good initiative (blockchain), this is priceless at the same time because it has changed the financial system to the point that even central banks have their projects on blockchains these days. This shows that it is even worth more than what it's being priced today due to its status as the pioneer of the payment blockchain initiative. I only hope that Bitcoin will hold/sustain the edge above Silver for long because the capitalization tends to reduce again during the bearish season which could make it inconsistent against Silver.