In terms of volatility, there is much more volatility in trading than mining…however both are subject to the volatility of the market. If you mine Cryptocurrency A, and the value of it drops, and you are holding that crypto, then you will lose out on money. Same as a trader. However, the risks are spread out differently between the two.
I love Monero from a technical and ideological perspective, but I just don't think it's a good investment (compared to Bitcoin) for the medium term because the most significant cryptocurrency adoption events will likely come from businesses and governments accepting or making it easier to accept a currency.
And a high-privacy crypto like Monero probably will not be accepted by a lot of major businesses and made easier to use by governments (and this will keep many whale investors away), and to a lesser extent. Also, Monero just doesn't have a big name like Bitcoin or Ethereum, which matters a lot in the medium term (long term is much harder to say--heck, for all we know, the current top 20 cryptos could be mostly abandoned in 5 years).
I have been using Blockchain app. iOS It has touch id enabled. And has a bitcoin wallet. You can add the passkey as well. IMO the best thing about it is that it shows your currency value.