What about now the Bitcoin train is gone.
IMO, it's gone in case you'd like to become rich but if you'd like to use Bitcoin as a payment than you should buy some coins.
invent about 50 coins, and introduce them over a year. At the same time, make friends with people on Twitter. They will shill for you. Premine 3% of each coin for the bounty purse.
watch the fur fly!
alternatively, buy Monero because it will be about 1 billion dollars next year, for 1 coin.
That's doubtable that monero is going to reach $1B. That's what you want not a forecast. Now it's hard to make some forecast about XMR/ BBR/ FCN / QCN as they've recently developed.Time will show who's going to be the second BTC or at least second LTC* (LTC at the beginning not now) !
As for monero, you may invest in this coin but remember there are a lot of botnets