I would pick the TRON and XRP.. although bitcoin would be much higher on this August probably. 
Tron is fine to be the selection of the coin, but XRP? Hmm, I am not sure because after what happened to the XRP, XRP had a hard time lifting the price or gaining more investors to invest in the project. But if the developer can solve the problem, XRP will have a chance to grow and lift the price. Until that time, maybe you can select the other coins besides XRP. But choosing bitcoin will be more than enough because bitcoin now breaks $32k (finally).agree to what @michelle said , xrp is in danger position now together with xmr because exchanges are dumping them and people are dumping them aswell because they are scared to what can happen
but theres no bad news on tron so far and tron is a better contender than xrp even if we disregard the xrp issue that happened lately and last but not the least bitcoin will never be gone on the picks all the time .@henyo26 if you believe that btc will do more on august then you better bag more btc .