Bought 3936 DEC with BNB mined with NICE HASH MINER

Hi,
Little story.
I use on my gaming PC NICE HASH MINER.
I have GPU GTX 1060 6 GB, i5 9400F CPU, 16 GB DDR4 3200 Mhz
Mining power is random every day:

So like 1.25€ avg on 24h
Miner use BTC, so need minimal 40€ in BTC to withdrow it, and i 3 days have like 19.5€ in BTC, because price on BTC drop 3 4 days in row...
So what i doo?
I trade (swap) BTC to XRP, because minimal XRP withdrow is 20 XRP (20€)
Next step i make mistake.
I send 23XRP to binance smart chain (because i want buy SPS or DEC) but to convert XRP in DEC dont work and always ask me for BNB fee...
So, i send 23 XRP to normal BINANCE exchange, swap XRP in BNB (get 0.057 BNB)
Next step i send 0.057 BNB from binance to binance smart chain, and i got another problem
again cant swap BNB in DEC...
So i open METAMASK, and i find option for swap BNB to DEC, but i cant swap all BNB because again they want fee in bnb...
so when i try get max 4300 DEC, no BNB for swap, so i put 0.055 BNB to swap and get 3.936 DEC
they stole me 364 DEC for simple swap tokens...
2 USD for swap only, and lose fee for transfer HASH-binance chain - binance- binance chain....
Next time i will not make same mistake.
ROAD is:
HASH BTC (20€) buy 20 XRP
Send 20 XRP to binance
swap 20 XRP to BNB
send BNB to binance chain
open METAMASK swap BNB to DEC or SPS
end.
Now i have 7.4k DEC on account

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