Though most times wen I made mention of blockchain and bitcoin with other currencies they seems not to understand how it's I have showed them more light but all they says is calling it scam etc,
This is basically the way I describe it to people who are not IT or tech savvy.
What is bitcoin?Imagine there's a coin that is currently worth thousands of US dollars, but it's not made of silver, gold, platinum or any other precious metal. In fact, it's not the kind of coin you can carry in your pocket or put in a piggy bank. It's a digital currency, which means that it exists only as an electronic record on a blockchain.
[1]It is not affiliated to any country or government, and thus does not have a central issuing body or a regulatory body. As a consequence, bitcoin is a decentralized currency.
What is blockchain?Imagine playing cards with a few strangers, but none of you have poker chips, and you've all left your money at home.
Since there's no money on the table, each of you takes out your notebooks, and all of you start writing who's betting how much, who's won, and who's lost. No one trusts anyone else at the table, so everyone keeps their notebooks to themselves.
At the end of each round, you all compare what you wrote down. That way, if someone makes a mistake or decides to cheat to add some extra money to themselves, that attempt is easily caught.
After a few rounds, the entire page of your notebook will be filled with notes on cash flow. You may call each page a "block of transactions".
Eventually, the notebook will have pages and pages of information, that is a chain of blocks.
[2] Thus: block + chain = blockchain
Paraphrased from:
[1] https://www.synquad.in/post/everything-you-need-to-know-about-bitcoin
[2] https://www.uptrennd.com/post-detail/blockchain-is-made-of-poker-chips~NzY5NTg2