I'm a programmer i can explain
Bitcoin and Litecoin and other crpto currencies like ether are all essentially just encrypted data from an encrypted database that is what the block chain really is . The bitcoin block chain really is just a public ledger that stores all transactions ever made with bitcoin . it is similar to the way banks and credit cards keep track of transactions through ledgers for digital money fiat currency . The thing with the block chain is that its a public ledger that everyone has access to so everyone knows who own what bitcoin and every transaction made by everyone who owns bitcoin so you never have cases of fraud. Since only a fixed set of 21 million bitcoins will ever be released . Every fragment of these bitcoins are just encrypted data. When you own a bitcoin what you are owning is an encryption key to that part of the data base that is the bitcoin block chain which is completely encrypted.
When people mine bitcoin what they are doing is using their computers to solve algorithm to decrypt the encrypted data of this database that is the bitcoin block chain and release it . then they store the bitcoin which is the encryption keys in a bitcoin wallet
which is a medium that holds the encyrption keys which can be anything like a flash drive , hard drive paper etc
in lay mans terms an ecryption key is just a sequence of computer code which is like a password is the best way i can dumb it down
People who mine bitcoin what they are doing is using their computers to decrypt code in that database and releasing that data which is the bitcoin itself at the same time processing bitcoin transactions.
Litecoin is essentially the same thing as bitcoin except coding script in its programming is a bit different allowing for transactions to be faster than bitcoin
because of all this encryption and because of their scarcity this allows them to be protected from inflation and fraud and allows them to be a decentralized digital currency allowing some annonyminity for their users as intended by their creators bitcoin whose creator is anonymous we don't know who made bitcoin
So it's value is in its scarcity set to 21 million ever to be released the block chain encryption technology and its intended use which is to be a currency as a medium of exchange and store of value.
as for an investment i'm no financial advisor or analyst but if you look at it's graph from the last year and last 5 years its showing all the same characteristic features of a classic Bubble asset like the dot com bubble and will eventually burst and crash who knows when
its price is being driven based purely on speculation and FMO (fear of missing out buyers)
its the most volatile asset you can have and right now its acting pretty poorly as a currency because no one is spending it or using it
they are just buying and holding hoping the price goes up and to cash out
it doesn't fulfill any of the key characteristics of currency which is to be a store of value and medium of transfer
its price is so volatile and it keeps going up and down that no one would use it as a medium of transfer for goods and services let alone a store of value
so its hard to say what will happen in the long term but trust me that bubble is gonna pop and bitcoin will crash and it has done so several times in the past and recovered . But as of now Bitcoin has a fatal flaw in its programming code i would say that unless is changed its going to have lots of problems processing a high volume of transactions which will be really slow and will drive transactions fees through the roof which will make people lose interest in it and abandon it if not fixed. In fact the transaction fees to transfer bitcoin right now are pretty high its like 10 USD or more for a purchase of like less than 5 dollars with bitcoin which is nuts lol