Seems like the main advantage for tipping currency is small transaction fees -- i.e. you use Doge instead of BTC because with BTC, the current median fee is around $8, so it makes no sense to send somebody a $1 tip. But with Doge, it's much lower, like 4 cents. So it seems a lot better.
Except that the only reason fees are so low is that network usage is so low. By design, with 1MB blocks generated every minute, the doge network can only process something in the ballpark of 30-40 transactions per second (depending on transaction size). Currently it's not anywhere near that level of load. But as load approaches or exceeds that level, it will cost increasingly more to get your transaction included by a miner in the next block.
That's exactly why bitcoin fees are high and the only reason Doge isn't seeing the same problem is 1. it isn't that big yet, and 2. it has a faster block rate (every minute instead of every ten minutes) so it pushes the problem a bit further back, but still doesn't solve it. The more people use the coin, the worse using it gets.
If Doge was actually adopted widely for tipping -- which it isn't really right now -- it would see a huge increase in transaction volume and quickly become unsuitable for that purpose due to the increase in fees.
It's much more honest to simply tell people that it's going up and you can potentially get rich quick by buying low and selling to somebody else before the bubble pops again. Pretending Doge is actually going to be widely adopted as a medium of exchange is just sad.
What do you mean? Pornhub accepts like 20 different cryptocurrencies, doge just happens to be on that list. Hardly evidence of adoption.