If you want to make some quick money by trading, I think most coins listed on coinmarketcap are pretty much all good, because they nomally rise with bitcoin, sometime faster than BTC.

There is an article about BTC will reach 100K, so you believe in it, BTC will be good buy and hold for long term.

There is always a risk to invest in alt coins, make sure do some research before you decide anything.

I wonder why u think ripple and mastercoin are good.

Because BTC is the mother of crypto coins, so many people are already on it, a lot safer than alt coins.

If you look for long term invest, BTC, LTC are pretty safe, otherwise i think top 12 coinmarketcap coins are better for trading.

I would say Doge!