On June 1st, EOS tokens will be frozen
May 22, 2018
On June 1st, 2018 Block.one, the company behind EOS, will distribute the last block of EOS tokens. On that day at 22:59:59 UTC, all EOS Tokens will become fixed (ie. frozen) and will be non-transferrable on the Ethereum blockchain. Before that happens, you can either exchange your EOS Tokens for another cryptocurrency or wait until a new blockchain is created.