My preferences are only top three coins in coinmarketcap which includes Ethereum and Ripple. The reason why these are the preference of most of people including me is because it has the largest market cap in cryptocurrency which means they have the biggest volume thus more people are expected to use it.

This is correlated to gambling. The transaction fee and security aren't just things we should consider; sometimes we need to consider the volume so we can gamble with a lot of gamblers use to play thus we have more probablity of winning with huge bonuses.