I think next 100x its mean for an investment like above me said but today, its still difficult to determine the coins because bitcoin wants to break the barrier for more high. so if we have coins which in top ten coinmarketcap, then i think it will be worth for a long term and i suggest to hold the coins after bitcoin have the good position. in that time, the altcoin will be raise too and will reach the highest price like bitcoin and you can see the next 100x worth of coin.