Sorry but you have no idea what you're talking about. You are confusing privacy coins with mixers. There is NO way you can trace a monero transaction for example; stealth addresses are used so people can't discover the funds you hold with your public address. Also monero has a built in mixer, the mixing takes place every time funds are sent, it's called ring signatures.
The only *possible* problem you can face with most privacy coins is that an entity can scan your traffic and know that you are using monero for example, but they can't know what you actions/transactions you have done in the network and if you use tor/vpn you are already immunized against this anyways..
Exactly. It's extremely difficult to be able to track & trace Monero transactions on-chain. The complexity of RingCT + Confidential Transactions makes government's efforts useless. The more mixing inputs there are for an XMR transaction, the more difficult it'll be for anyone to obtain the origin of funds. It's this feature which makes Monero extremely useful for the Shadow Economy. Even ordinary people like you and me, will find Monero to be an indispensable tool for preserving privacy against "prying eyes". So far, Monero is the strongest and most decentralized privacy coin available on the market. It could experience a "boom" in price if darknet markets and everyday people use it more thoroughly. I think it's better than Bitcoin in many ways.
While privacy coins like Monero bring strong anonymity, the ability to be traced relies solely on yourself. As long as you take the necessary precautions to hide your identity, no one will be able to link transactions to you. But acting irresponsibly could expose yourself to the public even if you use the strongest privacy coin in the world. I think that as Fiat becomes debased by governments worldwide, more people will be using privacy coins both in the Shadow Economy and the traditional economy.
What do you mean by "shadow economy"? Only the darkweb or the entire criminal economy?
If you are talking about the entire criminal economy(conducted offline on the streets),fiat money will dominate forever.
If you are talking about the darkweb,Bitcoin is still the cryptocurrency that is widely adopted by those .onion darknet marketplaces.Monero is the second most adopted cryptocurrency,but it might become number 1.
The goverments will try to ban privacy coins for sure,but that won't damage their usability,since they are mostly used for buying and selling illegal stuff anyway.The price of monero might go down to a few dollars,but criminals would still use it,because they aren't crypto traders,so they don't care about price volatility and profits from crypto trading.
I'm referring to the "illegal economy" both in the real world and in the dark web. I know that most people use privacy coins for good things, but governments don't see it that way. It's no secret that the Shadow Economy relies more on Fiat than crypto itself. Even with many darknet markets accepting privacy coins like Monero and Zcash, Fiat continues to be dominant. I think that's largely because Fiat is stable in price, while crypto is not. Privacy coins can provide the best features in the world, but if they're unstable in price, a very small minority of people will be using it to conduct "illegal transactions". For the sake of the entire crypto industry, it's best for it to be this way in order to bring some level of legitimacy to privacy coins. Only then, governments will allow the widespread use of privacy coins in the mainstream world.
Imagine if privacy coins were only used in the "illegal economy". They would certainly face a ban from many governments worldwide. Even now, these entities are claiming that privacy coins are used for tax evasion and money laundering. It's evident that the government doesn't want you to use something they can't control or keep track of. It'll be an never-ending war as privacy coins try to find their way to "fit" in the mainstream world. Just my opinion