Good luck to your journey in the army, the best coin for you to buy is the BTC, ETH, BNB or SOLANA, $1000 is already big capital for investment and if you are planning for a long term then that would be great, one year is also good but would be better if more than one year until we see a big pump for BTC.
The price of the bitcoin now is already high and about to reach its new ATH but it doesn't matter as long as you are planning for a long term investment.
I believe his service was already over as he posted this march 2019, and he said after 3 months he will join the army, so let's say june/july 2019, so after a year = 2020. june/july 2020, but btc at that time was only around 10k.
It seems the author of this thread cashed out later than July 2020 as he posted this in Feb 2021. Nice decision though to invest in BTC & ETH. He got his profits for holding it. And now, BTC is back again at 60k level, a lot are already gaining good profits here.
Thanks to everyone who helped me then. I invested $ 1000 in Bitcoin and Ethereum. and my small capital has grown in 5 times.