Want to emphasize this point. Right now almost all Syscoin features require Syscoin to use them- including the marketplace feature. So once we launch if Syscoin marketplaces catch on, there will indeed by buy pressure as people will need Syscoin to buy items on these marketplaces.
As I mentioned before Syscoin creates all kinds of business opportunities for smart devs. A keen developer could easily implement BTC/SYS conversion on the frontend of a marketplace using an exchange API to make it even easier for people to move from BTC/RZR/VRC/etc -> SYS for the purposes of purchasing goods on Syscoin marketplaces. This could all be pretty transparent to the end user (they still think they are buying something using BTC). In either case, the use of Syscoin marketplaces will create natural buy pressure- and that is only 1 of 4 features we're releasing at launch (and we're actively working on escrow at the moment!). What happens if all the services catch on? A lot more buy pressure.
Syscoin is a really different type of offering while still descending the from the original Bitcoin codebase. Its going to be a whole new type of coin.