this is the movement from 2013 to 2018 which is obtained from the
https://coinmarketcap.com/currencies/bitcoin/ data from this picture what information can you get? with data from bitcoin price movements that have a span of one year I hope it can help you to be able to provide predictions for the price of bitcoin that will occur this year and in the next few years.
Bitcoin price movements with a span of 1 year (2013-2014)

Bitcoin price movements with a span of 1 year (2014-2015)

Bitcoin price movements with a span of 1 year (2016-2017)

Bitcoin price movements with a span of 1 year (2017-2018)

from this data shows that not always the price of bitcoin can be high, there must be a year that makes the price of bitcoin collapse and this year the price movements are almost the same as in 2014-2015 (prices tend to fall).
Well, they always say at times, trends are always possible to see repeat themselves, but at the same time, we also need to understand that past trend is not an indication of what will happen in the future, being that a lot of things are changing, developments are moving fast, and things may actually be faster this time around.
However, if we are technically to judge from the charts, it is normal that we would still see some more trend downwards followed by a long period of consolidation as the case may be before we start seeing an uptrend eventually, but in cases like this, time usually is the only thing we have.