So what's the best coin to buy a cup of Coffee with? Transaction cost must not be expensive and the transaction must complete before the Coffee gets cold... 
Tron is perfect. Fast transactions like instant's. Tron is the best of it. Is there a coffee shop that accepts crypto, where I can pass time with a cup of coffee? 
Tron is not much better, it is better indeed to choose Doge because the price tends to be stable,
it is very rare for Doge to drop sharply, and that makes Doge special, use doge my friend, your Coffee shop will be more populer.