What i have learnt from standalone store owners

This is the duration of some of my relationships: 

Grocery store - 18 years 

Stationery Store - 18 years 

Electricals - 18 years 

Fruit vendor - 7 years 

Dry Ration - 2 years 

Cleaning supplies - 8 years 

Medical store - 6 years 

Florists - 7-8 years 

And over these years, I have learnt a few things from these wonderful people. Here are some of them: 

A. A simple board outside the store asking what they can stock. No AI needed to do inventory management and get new product ideas. 

B. Personally greet every person walking into the store. At one store, every customer gets personal attention and its a pleasure to go in there, even for a small thing. 

C. Be realistic about setting expectations. Tell them when something will be available. 

D. To the customer, you are the subject matter expert. Play that role. 

E. When a better product or offer is available, give it to the customer proactively. 

F. Indifference is the fastest way to lose a customer. A positive interaction goes a long way in retaining a customer.

What are some lessons that you have learnt from your interactions? 

On World Environment Day, lets talk about Blockchain

Blockchain is, simply put, a distributed ledger in which, every time a transaction takes place, an entry is made in ALL the copies of the ledger. 

Let's say that this blockchain has 2 people. A transaction happens. It is logged on 2 machines. No. of post transactions: 2 

With 3 people: 3 

With 4 people: 4 

Now, lets see the quantum of 5 transactions on these sizes of blockchain: 

2 people: 10 transactions 

3 people: 15 transactions 

4 people: 20 transactions 

5 people: 25 transactions 

This means that as the size of a blockchain increases, the number of transactions multiples. 

All those transactions consume energy and electricity. 

Do they make the transaction 2x, 3x, 4x secure? As compared to ONE backup? 

The simple answer is: NO. Creating n copies of a transaction does not make it n times more secure. The environmental impact is not commensurate with the security provided. 

So this World Environment Day, lets talk about the pollutants of tomorrow - Bitcoin and Blockchain.