If the price of the Altcoin goes up, then the Bitcoin value will go up. The reason is that when the price of Bitcoin goes up, the price of Altcoin goes up as well.
I think this is a bit true because usually altcoin will always follow the price of bitcoin even though altcoin trading volume does not go up but the value of that coins will go up.If people start buying Altcoin more than today, the price of Bitcoin will go up as well.
for this I think is not true, usually bitcoin will be slower in following the altcoin price movements. This answer is based on what I have noticed in every pattern and moment of rising bitcoin prices.If the price of Bitcoin goes up by 2021, it will be a record.
"IF" 
nah, the key is the price of bitcoin reaches ATH then altcoin will definitely be able to jump high.
Am I right?
between yes and no.