Do you really know what "pyramid scheme" is? Then let me know what it is, and how one coin is termed as pyramid scheme?
As per my knowledge base I didn't see any thing wrong with the business model of one coin but it is quite possible for a person to misunderstand a MLM business model with pyramid scheme, if he/she has no clue what pyramid scheme/ money chain/ even ponzy schemes are.... No gut feelings, but please put in some time to learn about them then judge on it. Don't play with pretexts please.