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What evidence can you produce that they are scam tokens? Why would one of the worlds largest banks partner with a scam company? And Tron is soon to no longer be a token and is converting to its own blockchain and will no longer be ERC 20.

Pre mined... owned mostly by company itself... token's price is controlled by xrp team and justin sun...

please check out these links and read ripple lawsuit statement...

https://steemit.com/xrp/@zxt/ripple-xrp-under-lawsuit-dump-incoming

tron scam:

https://steemit.com/scam/@zxt/cryptocurrency-tokens-are-scam-tron-usdtrx-is-a-disappointment

for general public, bitcoin and verge like mineable coins are best ... distributed more uniformly.... good for democracy.

i don't have hard feelings against them... just invest wisely!