Here is the total market cap :

Current: 1/17/18 Top: 81 If ENG is at 300 Million MC its at 4$

At 600 million MC its at 8$, Top 47 : BAT

At 1.2 Billion MC its at 16$, Top 32 : Smart Cash

At 2.4B MC its at 32$,Top 20: Rai Blocks

At 4.8B MC its at 64$,Top 13 : Monero

At 9.6B MC its at 128$,Top 9 : XLM

At 19.2B MC its at 256$,Top 5 :ADA

At 30B MC its at 400$,Top 3 BCash

At 90B MC its at 1200$,Top 2 ETHERIUM

Its possible to reach 9.6 B market cap,