to add to the criticism: don't be surprised if it reaches #1 in 2021,
by this metric.
Everyone forgets that this is the only meaningful "like-for-like" metric to use: the M1 money supply (Bitcoin can only ever have the M0 and M1 components according to the "monetarist" classification brackets for money supply types, because it doesn't use credit-based expansion). If we included all the different extended money supply bracket (there are 6 brackets, designated M0-M5), Bitcoin would once again be the minnow (but monetarist purists can argue that it's not a like-for-like comparison, amongst other arguments)
still, I don't see why Bitcoin eclipsing it's competition in this way shouldn't be celebrated, but also perhaps I agree with bbc_reporter that celebrating the same milestone twice is not quite so exciting.
(maybe Bitcoin could also become more valuable than M2 or M3 component of smaller fiat currencies, I have no idea about the size of those figures, perhaps it already happened
)