These are the downsides I see. I
1 - The original Cryptonote/Bytecoin devs are likely attacking Monero (see blockchain fork which didn't require a 51% attack - but a deep understanding of sourcecode)
I agree. I think surviving the attack so easily (without even forking to exclude the bad transactions) adds a LOT of confidence.
2 - The original code contains unsafe / undocumented C code.
Weaksauce.
3 - The devs are moving rather slowly from a perspective of what other coins provide (No official GUI, blockchain is still loaded into memory, etc). This is likely due to the Cryptonote (non bitcoin) codebase. However it appears Zoidberg/BBR is moving faster in these areas than the Monero team.
They treat my money very very carefully. I appreciate that.
4 - Monero is not user friendly. At the point it becomes successful / gains market share it will likely be labelled as intentionally kept user unfriendly in the beginning to exclude non geeks.
Anybody can easily buy XMR on Poloniex today, if they can manage to send BTC from one exchange to another. If you can't, I'll happily help you get some Monero.
5 - An outside entity had a period of a miner that was up to 5X faster than the publicly available miner.
Yes. The amount of XMR involved is pretty small. They probably spent it all on the attacks.
6 - Arguably it's inflated price is due to being shamelessly pumped by bitcoin whales. If/when they remove their support - it tanks.
They buy as cheaply as they can, because they're not stupid. And they won't stop supporting it because of a wee storm by disgruntled scammers. They want XMR because of its particular features. There is no other place to get them.
7 - Blockchain bloat
Nobody cares except the trolls. It just means thin client is more important for XMR than it was for BTC. If Chandran signatures are adaptable to the XMR blockchain without undue disruption, that will reduce the bloat, but really, having a blockchain 5x the size of bitcoin is not going to deter anyone from pool mining, which is all that really matters. Just look at the hash rate on XMR. Up 60bp per day since June.
8 - SuperNET chose the other primary Cryptonote coin.
It did. You can decide if that is good or bad. I won't touch it with a ten foot pole right now.
The emission is high NOW, which means the coin is cheap NOW which means you should buy it NOW. The cheaper the coin is, the more dispersion it gets, and the more rapidly the economy can grow. Spread the coins around.
We need more serious FUD:
10 - Not enough financial support for development. Holders are greedy and foolish, and won't pay for software.
11 - No interest from dark markets. I mean, seriously, if your anon coin can't be used on SR2/TMP, what good is it ever going to be?
12 - Too much interest from dark markets. You think Eric Holder is going to wink at your drug trafficking tax dodge? The hammer will come down!
13 - Bitcoin is failing. If the grand-daddy can't float, how can the baby float?
14 - Not enough liquidity. No serious money can go to XMR because pump&dumps are just using it to drain off fiat into their BTC wallets. The cap has been down for weeks now. Clearly it's dying like any other alt.
15 - Too much liquidity. It doesn't attract speculative money because there's no volatility. Without a viable pump plan, why would an alt speculator buy XMR? Better to buy LTC which at least has a dead cat bounce coming due.
16 - No legitimate merchant will touch it. Too scary.
17 - Anoncoin will implement zerocash, but without the trusted mint, using RSA UFOs. That makes XMR technically obsolete. Provable moon math trumps probabilistic guarantees from legacy crypto.
18 - Orange is ugly.
19 - Anonymous developers on the team means it is probably a scam/honeypot.
20 - Everyone is already all-in darkcoin, so it's too late for XMR to be leading anon. Why then should I not prefer the leader?