This is really true, I think.
The other end of it is to consider the attributes of safecoin as a currency. As confidence grows in the solidity of the network-- and thus the veracity of safecoin–the anonymity, transaction velocity, etc., of safecoin will certainly cause it to increase in value, perhaps fantastically, due to speculation as well as supply and demand. This will only drive farmer participation and thus expansion of network resources and stability, builder participation, etc. The more resources the network gets, above what is being used, the harder it will be to get a lot of safecoin by farming, but everyone should be able to get some, increasing its network effect, and thus its value.
Safecoin creation will always be linked to the management of resources, but its external value as a currency could easily gain a life of its own, which will only tend to cause network infrastructure, software, etc., to be built even stronger. All the while, as the network gets slicker and more useful, it will become the place to be regardless of the farming aspect, thus increasing the network effect even more, and thus the value of safecoin.
Pretty neat dynamic potentials.