Look, by not buying you are in fact taking a risk. If the world decides to use this as its global currency and all other currencies become worthless you may be forced into servitude working 70 hours a week for a tiny fraction of one of these invisible objects. People who got in early would be able to simply retire. There is a risk in not buying also. The only risk in buying is that the currency you buy gets less valuable and then you can just buy more. The risk in not buying, well, if you are young, let me come back in ten years and laugh in your stupid face and say I told you so as you shovel shit for a fraction of a bitcoin a year.