I think best one right now is probably doge. It has biggest market cap and it wasn't pumped enough. I plan to buy and hold some doge just for fun to see my folio rise.
yes that's what its all about. Some people are very serious when buying some coins, they are always looking for the perfect coin. I know of a story of a lady who bought some verge just for fan on January 1st 2017 when it was $0.000018. Today look at the price of verge now. Just think, about it a $100 investing in verge on January 1st 2017, 'just for fun', would have given you $1.5 Million dollars last week when very reached ATH $0.25. This is mind blowing!. check the stats on coinmarketcap.
I thinks buying some coins just for fun is a great idea.