My questions are simple guy's;
* where can we find a good mining sites or Apps?
* Did it has is own risks different from bitcoin investment?
* what benefit can we stand to gain mining bitcoin or altcoins?
There are no mining sites or applications that are all spam without exception. stay away from them.
Bitcoin investment, of course, is not without risks, but it is profitable in the long run.
Bitcoin mining is still profitable so far, but you need to buy an ASIC device.
As for altcoin mining, you need to buy several GPUs with high specifications to get a good return.
I was mining Ethereum before it moved to POS mining was profitable but now there are not many good altcoin mining options, I think the best thing right now is ETC mining.