A lot of people here seem to misunderstand this post. What the op is saying in essence is that invest what you can afford. If you  can afford 1 Bitcoin get it, if you can't buy what you can. This advice is great because a lot of people want to invest but they feel buying little fraction of it is too small. For me, I don't think is small.
So many people can't buy 1btc at the moment unless you are extremely rich so Op is Right