The blockchain technology can solve many problems. It's a decentralised, immutable, trustless ledger (database)... There are tons of scenario's that pop to mind, basically any scenario where equal partners want to create a database between them, but don't fully trust one partner to run a classical database out of fear this one partner that hosts the db would tamper with the data.

You can use a blockchain database to store insurance information and share it between insurance companies and individuals; univeristy's can use it to store hashes of grades, titles, diploma's, so somebody interviewing for a job can immediately be crosschecked about the diploma's he/she claims to have;... and those are just 2 commonly known examples.

For bitcoin, the blockchain technology solves, amongst other things, the double spending problem. By storing transactions onto a decentral, trustless, immutable ledger, people can not double spend unspent outputs without their transactions getting rejected (given that the first transaction is already included in a block at the time the double spending transaction is broadcasted).

Even the people that hate crypto currencies see the potential behind the blockchain technology

Blockchain is a technology that allows anyone to send anyone else a piece of information, currency or data in a secure, transparent and anonymous way

Paypal has chargebacks in case of fraud that is the reason online stores have paypal and no other payment processors like paytoo, skrill.

What protection does bitcoin offer in case the seller is fraud (send defective products or does not ship the product & services)??

I feel this two thing can solve many issues especially the problem which are related with financial system like money transaction or paying bills ,It also opens a income source for the unemployed people , and blockchain is a database system which provides security to the activities which are done by users.

Bitcoin as a currency solves a lot payment related issues, especially for international trades or small businesses with numerous exchanges charges.
Blockchain on it's own is a huge technology that solves plenty problems. It can be used for numerous daily purposes.

Bitcoin was created to solve the problem of trust in electronic payment systems where the party that maintains the ledger has absolute control over it and users are totally dependent on them. Banks and centralized payment systems can print money, freeze and seize accounts, rollback transactions, they know about every spending you've made. Bitcoin has successfully solved all these problems in its first day. This is a pretty remarkable achievement, so even if blockchain tech will fail to become widely adopted, and even if Bitcoin won't replace fiat or become massively adopted, millions of people around the world will still find it useful.

A privacy problem. Some of the people using Bitcoin for its privacy so it can't be trackable for who are transact this amount of BTC and who is the sender or the receiver. DarkNet is the example.

BTC can solved a lot of problems but among them the main problem that is solved by BTC is unemployment. People nowadays investing in cryptocurrency and it is making the economically stable. It is a big help for the nation that the unemployment problem is solving day by day.

Blockchain is capable of solving so many problems. The most important one is the one related to security and blockchain has proven beyond all doubts.