LTC will increase 100% from these levels at some point before the halving just remember that....expect ltc to out perform the general market in the short term because of this

In less than 172 days Litecoin will halving and it will change the reward coin to 12.5 coins, it seems that after halving there will be a very significant price change that might exceed the highest price last year. Litecoin will be the best after bitcoin in the coming year.

Litecoin has already been doubled in matter of weeks if there are good signs in Bitcoin market then we can see it holding all gains continuously. If there is some negative move in BTC that can disturb every other market and LTC will not be different as well. But I will say in short term all the gain can be sustained as market is in neutral zone already.

according to my studies as seen from graphs bitcoin will surge to 821500 USD
while Litecoin will be around 6500 usd in somewhere in 2021

At First you need to have around lot of bitcoins to become a billionaire by 2021 calculate it by urself how much you have.. you wont be a billionaire.
but lets assume you do so i would say HODL but my theory is based on proven facts of cycles which crypto have
i want to post my theory but its very difficult to understand somewhere you have to check the charts of litecoin it has a cycle which is proven to work. The rise which litecoin had between of 2013 to 2015 it went 2x in this while we did however ran 4 to 6 months ahead of the previous cycle but it does prove the theory of previous cycle following the current one.
Somewhere around 2021 mid june to july you will see it crossing ATH around 400 USD for litecoin and 20000 usd for bitcoin and by the end of 2021 you will see  close to 1 million usd rise for bitcoin which litecoin would be around 6500 to 7000 usd. litecoin however would have bitcoin price movement.

IMHO, we need a lot of traction..some of it just to stay sideways in price

1) newbies...which there are none

2) ETF/or other major adoption news of some note

I myself figure, we are in the GOLD zone price wise and could go sideways for the next 1.5 to 2 years. This for the same reason gold has been sideways

more or less these last years...but with BTC it may make a bit MORE sense for it to be at 3k vs gold's price in its usefulness

but, nobody seems to be 'Window Shopping' for any crypto BTC/LTC or whatever...thus Crypto Winter in my case I'm figuring 2 years for LTC or BTC or

whatever to get back on the horse and gallop. *unless the horse dies or Craig Wright is Satoshi for BTC and shoots the horse*

as usual, I hope LTC will pump first and show BTC out of the fog..but damn this is annoying

2016 we had halving from there miners were not able to sell more bitcoins so as bitcoins started becoming more rare but same time the price was reaching a good level so many miners holded lot of coins which they started to sell around 2017. so we have a halving around may 2020 which means you would see a bull run around mid 2019 to mid 2020 after which it will result in huge stability for mid 2020 from there it will be stable till another bull run somewhere mid 2021 to which will perhaps break the ATH and december 2021 you will see bitcoin might reach close to a million.
So according to my theory the bull run has already began and we might reach close to 10k bitcoin soon in short time perhaps a week or 3.

That depends on what the average Joe thinks. You are right if it goes sideways people tend to spend it in contrast to the coin being volatile, but ultimately most buyers are still waiting for a pump.

It is so interesting because for the first time a market is a phenomenon of such global magnitude and openness. This takes behavioral economics to another level, at least in terms of intensity. As you say - interesting times!