Question about Sharding Technology

[dxbcoin]

Dear Seniors,

As a newbie and don’t know much about blockchain, recently I have found something I’ve never known/realized that there is main issue now between blockchains which is the communication between each other. This got me more questions about blockchain technology. And few days back I found sharding technology that offer “cross-shard transactions” which I understand it helps blockchains to “talk” to each other. I’m interested and curious at the same time. And I wanna learn more. So,

Does it mean I can put bitcoin in MEW wallet? I still don’t really understand the possible situation in reality. Can someone explain more and give me scenarios to understand better about it? Thanks a lot for helping me to study.