By the way,bitcoi is tied with the USD,so if the dollar value decreases,the bitcoin price will have to decrease as well.
that doesn't make any sense!
it is like saying if US dollar value decreases the price of goods will drop too! that is completely wrong. the price of everything will go up because value of USD would be lower in that scenario and things like bitcoin which are also an investment should technically rise because people seeing their money is losing value would want to invest it in something to "store the value" and one of those things is bitcoin.