Bitcoin was created to give you total control so I don't understand why you'll want to give up that privilege through staking as I understand staking makes it impossible for you to have access to your coins during a particular period of time. Bitcoin doesn't have staking ability (and it doesn't need one) but the answer I can give to you for your problem is to download a wallet (possible electrum) store all your sensible information securely offline, get your wallet address and delete the wallet then just be stacking your Bitcoin in the wallet through the address untill when you need it before you can bring the wallet back online and gain access to your coins. You have to be disciplined not to get tempted to make the wallet active until you have reached your scheduled (untouchable) duration.

Hodling Bitcoin already gives you profits which you can sell to withdraw your profits or continue Hodling for more profits. Don't send your coins to exchange for their staking rewards, those are strategy the exchange are coming up with to have control over more Bitcoin so they can try to manipulation the price of Bitcoin to favor their agendas. Hodling your Bitcoin gives you profits as much as staking would have and you still have security over your coins.

If you aren't after the kind of yield-earning staking, which is risky and doesn't even guarantee you of a profit, and you also don't like time locks, then consider putting your back up in a sealed container and then in a solid case and bury it. If not, cement it. Or bury it under a tile. I doubt if you would still dig it every time you feel a little panic when the price goes down or whenever you're bored and want to play poker or place a bet on a sports match.

Well, if you panic, you should train yourself not to panic easily or be tempted to make deposits with your Bitcoin. You should be able to control yourself for this, because there is no other way than to control yourself. If that's all you can't do, I don't know what else to say.

When I saw the post I thought your aim was to find a way of earning more Bitcoin just like people earn when they stake their tokens. This response narrowed your post down to psychological challenge. Well, I will suggest you go back to why you even started your Bitcoin journey.

If you still panic when price of Bitcoin is dropping,  most likely you are overinvested in Bitcoin and that is an error. You are expected to only invest amount you are not in urgent need of, amount you can leave for years and still live your life normally. Make the necessary adjustments and have peace of mind. You can adopt the DCA method that takes care of this emotional burden.

Every true Bitcoiner must give Bitcoin a chance to grow by developing a long term perspective that should withstand the periods of consolidation and corrections.

Well looking at the fact you mentioned that sometimes you're bored and you use your BTC to play some poker games, its obvious you're somewhat not involved in other activities or jobs apart from signature campaigns. If I'm right, then you need something  else to keep you busy, you can find a new hobby like reading, hanging out with friends, forming discussion groups, learning a new skill, or even applying for a job. These will limit the free time you've to start getting bored unnecessarily and preying on your BTC against your wish.

I would advise against using something that locks in your coins, because you might miss out on huge profits if you do. We are in a cycle of pumping and recovery at the moment and we might hit a new all-time-high soon, where you can "cashout" with huge profits.

I will advise you not to lock in all your coins, if you have the option to do that. Keep a small amount locked in, but keep the majority of the coins accessible if the Bitcoin price goes to the Moon, so that you can sell for some profit. (Remember, if you sell for a profit and the price goes down again.. you can buy more coins with the profit) 

Instead of trying to give up your bitcoin privileges, why not practice and control your emotions? Because maybe in the future you will have to work with a larger amount of capital or participate in larger-scale plans. If you cannot train yourself to have a good spirit and strict discipline, how can you expect to achieve more success? Furthermore, I think if you have enough absolute faith in bitcoin then there is nothing to fear, but maybe you don't have too much faith in the future of bitcoin.

Burying it somewhere is kind of an overreaction to your bitcoin storage idea, you don't need to do that if you have to really stay away from your bitcoin. I think that Timelock's the only thing that might work to solve the question that OP is asking. If you have a need to really make it untouchable to you and you don't want to spend it or sell it when the price goes down, why not just learn how to discipline yourself?

Op I think the solution isn't about staking your bitcoin for a duration of time that you can't get access to, first of all you staking those coin is like giving up full control or access bitcoin network guaranteed to its users. The solution is to learn to be discipline by not letting your emotions make decision for you, I taught this problem was associated to only newbies who have not gained enough knowledge about Bitcoin but here I am seeing a sr member with same issue. No matter how bored you get I don't think using bitcoin that has been planned for long term holding for gambling is a good idea because, within 24 hour you can destroy your bitcoin portfolio if you are not discipline enough. I'll recommend you use your fiat currency for gambling should in case you get bored.