I never did trust the coinmarketcap percentage of bitcoin dominance at a little over 50%. In face studies have proof that when we take into account price per volume over 80% of the value on exhanges are related to bitcoin. Most trade pairs are mostly toward btc so that is not a surprise.
So it brings the question if all this is just a ponzu scheme? It currently seems like so. The early adopters of bitcoin are rich but as time passes more crypto has been created for what purpose other than pulling more btc into their own pockets. Of course there are the innovations of eth and other altcoins but their evaluation is far less than bitcoin.
Over 2000 cryptos are listed on coinmarketcap and thousands more around the web. It is easy to see the dilution of crypto in increasing the numbers coins are to be trade for btc on exhanges. It makes it reasonable to believe this will continue as long as crypto exists. The ones at the top of the prymaid who holds majority of btc would not mind...