Facebook is dominant but not a monopoly and certainly not necessarily the future. Apple has only around 16% share of the smartphone market, down from 100% at the iPhone's launch. Netflix has less customers than Amazon Prime depending on how you view the statistics and its dominance is nowhere near to inhibiting new entrants. So those companies competitors are doing quite well actually.

Bitcoin dominance hit a minimum during the last massive price spike (see below), yet its marketcap/$USD price was at a maximum. That's no accident because as money is made in alts, people profit-take into bitcoin. It's the same structure for any monetary asset market and is in fact the very definition of a "reserve asset". There were of course other factors at play such as hedging the contentious hard forks that were going on, the blocksize war and general ideological differences in priority. But such needs to hedge will always exist - periodic storms in markets are a permanent feature of economics.

How does the market respond to such conflicts ? It caters for all through diversification - same as with any commercial sector. 20 years from now, the idea that there was only ever going to be 1 blockchain asset will seem comical, a bit like Thomas Watson's statement of "I think there is a market for maybe five computers".

Non-bitcoin digital asset market share moves in sawtooth waves just like bitcoin's own fiat market. It usually declines to just below the last peak marketshare during which time much of that capital flows into bitcoin and consolidates it. Then fuelling starts again and we move through a new cycle.

There are very few natural monopolies in the world and monetary assets - digital or otherwise - are definitely not one of them. That is something so-called bitcoin maximalists should be thankful for and not moaning about because without it you'd have stagnation and ultimately death of the entire sector, including bitcoin.