Which one?

[LadyCoin]

BITCOIN is the future without question.
Question is which one to invest, Bitcoin,BitcoinCash,BTG,and more forks coming soon?

for now Bitcoin becomes the best investment in my opinion.
New year effects make BTC prices go down.
so it's better to buy it now before the price rises.

[MarkusIsaiah]

If you want a long term investment you can go to bitcoin. because it has a high value unlike the other coins. but if you want to go to short term investment then try the rest of the coins.

[acheampong64]

i would always go in for the original for my safety sake. All the others apart from BTC are forks and hence not the true BTC. Some even trade poorly and if you invest your money there, you'll be in trouble. So better form of investmen, I'll do with BTC

[dimastegar]

For long-term investment, Bitcoin is better. But I think the taste of Bitcoin Cash and Bitcoin Gold also can not be underestimated. Because I'm sure both will touch New ATH in 2018. So, there's no harm in buying Bitcoin cash and Bitcoin Gold.

[harrypotter1229]

I think the exact statement should be that the digital currency is the future. Maybe a lot of years later, bitcoin will be rarely circulated, and some bit coins may be collected by people. In the last few years, there will be a lot more altcoin combined with the actual daily life, and they will become more and more powerful.

[google98]

BITCOIN is the future without question.
Question is which one to invest, Bitcoin,BitcoinCash,BTG,and more forks coming soon?

Undoubtedly, the most reasonable answer to the question is Bitcoin. Still, Bitcoincash may well be worth keeping.
But it is not bad to think about investing in some other coin.

[jake zyrus]

I still choose bitcoin rather than any other cryptocurrency. Other cryptocurrencys need more time to be  succeed like bitcoin. and cryptocurrency commonly known by people is bitcoin

Bitcoin is the best than other cryptocurrency. In bitcoin is so easy to become successful and bitcoin is first known of people.

[Clauston]

BITCOIN is the future without question.
Question is which one to invest, Bitcoin,BitcoinCash,BTG,and more forks coming soon?

Would you know what is the difference between all of them?

[crypto.cr]

Yes i think more forks coming up ...

As per you question i think bitcoin always safe to invest, i think you should know more about other currency you mention on your post ...