Dates are good but uncertainty is at its best I guess.
2021 - Bitcoin reaches a new All Time High of more than 20k USD
May be may be not. It could just drop to 0 USD as well!
2024 - Next bitcoin reward halving
as stated above by @Charles-Tim
2025 - Bitcoin reaches 1 trillion USD market cap
2026 - BTC in circulation reaches 20 million
Lets just hope this happens. Otherwise there are lot more posibilites for example, BTC dropping in market cap because its value got diluted over the time as part of inflation. Due to useless currency, becoming null due to another futuristic project. Anything can happen.
2027 - Bitcoin reaches maturity and adult age (18 years old). Maybe we will have Bitcoin version 1.0.2 by that time.
Sure this is gonna happen, its about time.
2049 - 99.9 % of the 21 million limit will be in circulation (20.9 million BTC)
Hopefully mega mining projects don't fall and hashrate doesnt drop or it could be other way round, what if somebody finds another way to mine it more efficiently and faster, it could drop the timeline drastically.
2100 - History begins...
Everything that is past is history in future.
