Why?
Let's say you mine Worldcoin and you have generated so far 1000 WDC. Today they are worth 0.3133 BTC (mcxnow quotation of 0.0003132 BTC) or 39.5 USD (mtgox quotation of 126.15854).
If we all work and believe in this coin tomorrow 1 WDC can be worth, let's say, 0.01 BTC. If that will be the case your 1000 WDC will be equal to 1,261 USD
If the work better they can be worth 0.1 BTC, and you'll have 12,615 USD.

We must work togheter.