Other blockchain tokens on Internet Computer

Greetings! Can anyone shed some light on whether or not a token/blockchain activity from another system can be deployed on the Internet Computer? Can another decentralized system use the Internet Computer rails like they use Amazon Cloud?

Dom talks a bit about this here: The Internet Computer Weekly - Chain Keys and Ethereum Interoperation with Dominic Williams

Sounds good. What about the other top crypto?
EOS, CARDANO (ADA), DOGECOIN, lite coin, XRP ETC?