Now that XMR is discovering its own market niche people will start to form and build an economy around it. This will take maybe a shorter time than it did forming bitcoin's economy in the dark market. But beware to the community of Monero. You have to accept and embrace the fact that XMR might be seen as the "evil coin" used by criminals, illegal drug peddlers and maybe also terrorists to cover their tracks. This could be an impediment or an advancement in its development depending on your point of view.
There was a reason why Darkcoin dropped the "dark" to be viewed as a more "legitimate" alternative to bitcoin. Maybe they did not want to go to the dark market road. For me that is a big mistake. Monero is going where no one is willing to go. That will push for more advancement of the coin.
I think that a potential anarchist weapon should be tested real world in the criminal sphere (in the same way that states test their weapons in warfare). Bitcoin has gone the institutional side, Winkelvoss type, and is somewhat lost as anarchist weapon, and has become of late more a trap for people looking for freedom rather than a tool in their endeavour.
The goal of a crypto currency is not to have the biggest market cap. The market cap should be big enough such that individual trades are small enough compared to it not to "crash the market", so there is some need of market cap. But if a bigger market cap only comes through regulation and institutionalisation, it is useless. The economy using it (for real, as a means of exchange) should be diverse and large enough for it to be a genuine useful means of exchange. But that's it. Bitcoin has not a very large use as a means of exchange: it is mainly a speculation tool, and a "store of value". In fact, cryptos only serious use as a means of exchange has been in darknets. It is now somewhat used as a means of payment for software services (VPS, VPN...).
From the moment that distributed crypto exchanges exist (and that's easier to do than distributed FIAT/crypto exchanges), in fact, all crypto is the same market. You can then easily change from bitcoin to monero to whatever coin in a hopefully anonymous and unstoppable way, and all these markets unite, in the same way as most fiat markets are united by FX exchanges.
So there is no need for monero to replace bitcoin. It is very well that monero's resistance to state warfare is tested in the real world instead of in flame wars on forums, to see what the technology really has to offer.