AS per my experience of 3-4 years. we can expect 25000-30000$ per btc maximum. what is yours?
But do not invest your all money to btc , only invest what you can afford to loose. Do not put all the eggs to one bucket , diversify it. if you have 100$
50% put to btc others to alt coins.
With people who love the long-term stability, and see it like as a savings, put it all into Bitcoin is a wise choice and absolutely safe