yeah, for bitcoin there is no any bad news for the coming year and even for a few more years also, so if someone want a long term investment in bitcoin then he should not have to fear about that, and have to invest what ever amount one want.
I agree with you and 1 btc is not enough for a good long term investment. Because it is also like gold, when you are going to hide gold for a long time but only 1 gold. You will earn with it buy quantity over quality is better when we are talking about income.
for a part timer I think 1 btc is big amount to earn and its alwasy good to hold that amount in wallet as the price will be hihger in next few months.