Transactions tab, that view doesnt show if they are valid or not.
Sure.

how much btc did you invest to mine that much sdc?
To give you an idea 20k gives you 5sdc per day, 40k closer to 10.
What this means is that at the current market value, If you have 40K SDC, The interest you are earning daily is about $1.65 or $50 a month, $50 a MONTH, isn't that amazing? That is my cell phone bill, If you have 20k SDC its $25 USD a month.
This is at current market price, If the price doubles, these number double. Think about it.